Early British botanists and their gardens, based on unpublished writings of Goodyer, Tradescant, and others - Goodyer, John, 1592 -1664 (Printed by F. Hall for the author at the University Press, 1922)

Early postfire revegetation in a western Montana douglas-fir forest - Crane, M. F. (U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1983)

The earthworms (lumbricidae and sparganophilidae) of Ontario - Royal Ontario Museum. (Royal Ontario Museum, 1977)

Ecological inventory of wetland sites in the Thompson Chain of Lakes and vicinity - Montana Natural Heritage Program. (Montana Natural Heritage Program, 2000)

Ecological inventory of wetland sites in the Thompson-Fisher conservation easement - Hendricks, P. (Montana Natural Heritage Program, 2002)

Ecological land classification and vegetation description of Upper Bob Creek Ecological Reserve - Cornish, Beth. (Alberta Environmental Protection, Resource Data Division, 1997)

Ecological land classification of Beauvais Lake Provincial Park study area - Alberta. Alberta Environment. (Alberta Environment, 2001)

Ecological land classification of Big Hill Springs Provincial Park, Alberta - Sutherland, Ian. (Alberta Environmental Protection, 1998)

Ecological land classification of Police Outpost Provincial Park and Outpost Wetlands natural area - Alberta. Alberta Environment. (Alberta Environment, 2001)

The ecological relations of roots - Weaver, John E. (John Ernest),‏ ‎ 1884 -1966 (Carnegie institution of Washington, 1919)

Ecological studies on the genus agropyron in Alberta - University of Alberta. Department of Field Crops. (1932)

Ecological studies on the native grasses of the Grande Prairie-Beaverlodge district - Stacey, E. Clifford. (1927)

An ecological study of the Douglas fir vegetation in Banff and Jasper National Parks - Stringer, Paul William. (1966)

An ecological survey of Isle Royale, Lake Superior - Adams, Charles C. (Charles Christopher), 1873 -1955 (Wynkoop Hallenbeck Crawford Co., State Printers, 1909)

Ecological types of the upper Gunnison Basin : review draft - Johnston, Barry C. (U.S. Department of Agriculture, Forest Service, Grand Mesa-Uncompahgre-Gunnison National Forests, 1997)

An ecologically annotated checklist of the vascular flora at the Chesapeake Bay Center for Field Biology, with keys - Smithsonian Institution. Office of Ecology (Smithsonian Institution, 1968)

Ecologically significant wetlands in the Missouri headwaters : Jefferson, lower Madison, lower Gallatin, and upper Red Rock River watersheds - Montana Natural Heritage Program. (Montana Natural Heritage Program, 2004)

Ecologically significant wetlands in the Upper Yellowstone River watershed : including the Boulder, Clarks Fork Yellowstone, Shields, and Stillwater River drainages - United States. Environmental Protection Agency. (Montana Natural Heritage Program, 2001)

Ecology of feral horses in western Alberta - University of Alberta. (University of Alberta, 1978)

Ecology of sympatric populations of mule deer and white-tailed deer in a prairie environment - Montana. Wildlife Division. (Wildlife Division, Montana Dept. of Fish, Wildlife & Parks, 1989)

Ecology of the aspen parkland of western Canada in relation to land use - Bird, Ralph Durham, 1901 -1972 (Research Branch, Canada Dept. of Agriculture, 1961)

Ecology of the Columbian ground squirrel in the Sheep River region - University of Alberta. Department of Zoology. (1962)

Ecology of the Svjatoj Nos wetlands, Lake Baikal : results of the Svjatoj Nos 1991 expedition - Mlâikovskây, Jiérâi (Ninox Press, 1992)

Ectypa plantarum ratisbonensium : oder, Abdrücke derjenigen Pflanzen, welche um Regensburg wild wachsen ... - Hoppe, David Heinrich, 1760 -1846 (Verfertiget und verlegt von Johann Mayr ... und gedruckt mit Zeitlerischen Schriften, 1789)

Edinburgh Journal of Natural and Geographical Sciences

The Edinburgh new philosophical journal (A. and C. Black [etc.], 1828)

Edmonston's flora of Shetland : comprehending a list of the prevalent wild-flowers, horse-tails, club-mosses and ferns of the Shetland Isles - Saxby, Argyll (Oliphant, Anderson & Ferrier, 1903)

Eesti Looduseuurijate Seltsi aastaraamat - Eesti Looduseuurijate Selts. (Valgus, 1906)

Eesti Looduseuurijate Seltsi aastaraamat - Eesti Looduseuurijate Selts. (Valgus, 1912)

The effect of burning and mowing on Festuca hallii (Vasey) Piper (Festuca scabrella Torr.) - University of Alberta. (University of Alberta, 1980)

Effect of light on germination of light-sensitive seeds - Gardner, Wright Austin (1921)

The effect of low temperature and gibberellic acid on the amylolytic activity and growth of a tropical grass (Digitaria decumbens Stent.) - Karbassi, Parviz, 1941 - (1971)

Effect of mowing on carbohydrate reserves and regeneration of western snowberry (Symphoricarpos occidentalis Hook.) - Adams, Barry. (1983)