Echinoidea Pt. I-II - Mortensen, Theodor, 1868 -1952 (Printed by Bianco Luno, 1903)

Die Echinoiden der Deutschen tiefsee-Expedition - Döderlein, Ludwig, 1855 -1936 (Fischer, 1906)

An ecological characterization of Coastal Maine (north and east of Cape Elizabeth) - U.S. Fish; Wildlife Service (Department of the Interior, U.S. Fish and Wildlife Service, Northeast Region, 1980)

Ecological condition of coastal ocean waters along the U.S. western continental shelf, 2003 - United States. National Marine Fisheries Service. (U.S. Environmental Protection Agency, 2008)

Ecological effects of an artificial island, Rincon Island, Punta Gorda, California - Coastal Engineering Research Center (U.S.) (The Center, 1978)

Ecological evaluation of a beach nourishment project at Hallandale (Broward County), Florida - Coastal Engineering Research Center (U.S.) (The Center, 1980)

An Ecological survey in the eastern Chukchi Sea : September-October 1970 - Ingham, Merton C., 1930 - (U.S. Coast Guard Oceanographic Unit, 1972)

The ecology of coral reefs : results of a Workshop on Coral Reef Ecology held by the American Society of Zoologists, Philadelphia, Pennsylvania, December 1983 - Reaka-Kudla, Marjorie L. (U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Oceanic and Atmospheric Research, Office of Undersea Research, 1985)

The ecology of deep and shallow coral reefs : results of a workshop on coral reef ecology held by the American Society of Zoologists, Philadelphia, Pennsylvania, December 1983 - Reaka-Kudla, Marjorie L. (U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Oceanic and Atmospheric Research, Office of Undersea Research, 1983)

The ecology of the benthic and endolithic communities of a rocky reef in the kelp beds off Del Monte Beach, Monterey, California - Hoffman, Richard Gurney. (Naval Postgraduate School, 1981)

The Edinburgh new philosophical journal (A. and C. Black [etc.], 1854)

The Edinburgh new philosophical journal (A. and C. Black [etc.], 1856)

Education through nature study; foundations & methods - Munson, John P. (Kellogg, 1903)

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

The effects of inanition and malnutrition upon growth and structure - Jackson, Clarence Martin, 1875 -1947 (P. Blakiston's son & co, 1925)

Das Ei und seine Befruchtung - Royal College of Physicians of Edinburgh. (J.U. Kern, 1883)

Einführung in die paläontologie - Steinmann, G. (Gustav), 1856 -1929 (W. Engelmann, 1903)

Das Elbthalgebirge in Sachsen / von Hanns Bruno Geinitz - Geinitz, Hanns Bruno, 1814 -1900 (T. Fischer, 1871)

Das Elbthalgebirge in Sachsen / von Hanns Bruno Geinitz - Geinitz, Hanns Bruno, 1814 -1900 (T. Fischer, 1872)

Elektrobiologie, die Lehre von den elektrischen Vorgängen im Organismus auf moderner Grundlage dargestellt - Bernstein, Julius, 1839 -1917 (F. Vieweg, 1912)

Elementary biology, an introduction to the science of life - Gruenberg, Benjamin C. (Benjamin Charles), 1875 -1965 (Ginn, 1919)

Elementary biology; an introduction to the science of life - Gruenberg, Benjamin C. (Benjamin Charles), 1875 -1965 (Ginn and company, 1924)

An elementary manual of zoology, designed for the use of forest officers in India. Prepared for the Forest Department of India - Cotes, Everard (Office of the Supt., Govt. Print. India, 1893)

Elementary palæontology for geological students - Woods, Henry, 1868 -1952 (at the University Press, 1893)

Elementary text-book of zoology - Claus, Carl, 1835 -1899 (W. Swan Sonnenschein, 1885)