Reference Books
elementary
Hunter, Laboratory Problems in Civic Biology, American Book Company.
Bulletin of U. S. Department of Agriculture, Division of Biological Survey, Nos. 1, 6, 13, 17.
Davison, Practical Zoölogy. American Book Company.
Ditmars, The Reptiles of New York. Guide Leaflet 20. Amer. Mus. of Nat. History.
Sharpe,[TN2] A Laboratory Manual in Biology, pp. 140-150, American Book Company.
Walker, Our Birds and Their Nestlings. American Book Company.
Walter, H. E. and H. A., Wild Birds in City Parks. Published by authors.
advanced