Elementary text-book of zoology - Masterman, Arthur T (E. & S. Livingstone, 1902)

Elementary text-book of zoology - Parsons, John Herbert, Sir, 1868 -1957 (E. & S. Livingstone, 1901)

Elementary textbook of economic zoology and entomology - Kellogg, Vernon L. (Vernon Lyman), 1867 -1937 (H. Holt and company, 1915)

Elementary zoology - Kellogg, Vernon L. (Vernon Lyman), 1867 -1937 (H. Holt and company, 1902)

Elementary zoology - Beddard, Frank E. (Frank Evers), 1858 -1925 (Longmans, Green, and Co, 1898)

Eléments d'anatomie comparée - Royal College of Physicians of Edinburgh. (J.-B. Baillière, 1893)

The elements of animal biology - Holmes, Samuel J. (Samuel Jackson), 1868 -1964 (P. Blakiston's son & co, 1919)

Elements of biology - Weisz, Paul B., 1921 - (McGraw-Hill Company of Canada, 1963)

Elements of biology, with special reference to their rôle in the lives of animals - Buchanan, James William, 1888 -1952 (Harper & brothers, 1933)