You can plant for a perennial profit with sturdy stock from the Wildwood Nurseries : [a circular dated], January 28, 1931, and addressed to the U. S. Dept. of Agriculture, Washington, D.C - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wildwood Nurseries, 1931)

Your garden [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Paramus Nursery, Inc, 1928)

Your garden planting simplified : 1923 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. H. Moon Co, 1923)

Your home ... your garden [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Westminster Nursery, 1931)

Your home ... your garden [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Westminster Nursery, 1930)

Zoological Society bulletin - New York Zoological Society. (New York Zoological Society, 1901)

Zur Kenntniss der Chlorophyllfarbstoffe und ihrer Verwandten; spectralanalytische Untersuchungen - Kraus, Gregor, 1841 -1915 (Schweizerbart, 1872)