A Study of the Incubation Periods of Birds; What Determines Their Lengths
The book A Study of the Incubation Periods of Birds; What Determines Their Lengths was written by author William Harry Bergtold Here you can read free online of A Study of the Incubation Periods of Birds; What Determines Their Lengths book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Study of the Incubation Periods of Birds; What Determines Their Lengths a good or bad book?
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347. 28. Gumey — The Gannet. 29. Birds of New Zealand, Vol. II, p. 181. 30. Barrows — Birds of Michigan, 1912. 31. Harper— Bird-Lore, Sept.-Oct., 1914, p. 341. 32. Strong— Auk, Oct. 1912, p. 482. 33. U. S. Dept. Agric. Farmers Bull. No. 236, p. 8. 34. U. S. Dept. Agric. Farmers Bull. No. 64. 35. Dugmore — Bird Homes. 36. Encyclop. Britt. Edit. XI, Vol. 26, p. 180. 37. Forbush— Game Birds, p. 220. 38. H. Milne — Edwards — Lecon, sur la physiologic et an- atomie .... animeau. 39. Butch— Bird-Lore..., Mch.-Apr., 1915, p. 108. 105 40. Chamberlain-B. Ehett — Personal communication. 41. Cameron— Auk, July, 1906, p. 254. 42. Hutton and Drummond — Animals of New Zealand, p. 199. 43. Saunders, A. A. — Personal communication. 44. Bendire — U. S. National Mus. Special Bull. No. 1. 45. Hodge, C. F. — Nature Study Pamphlet, Bobwhite, p. 13. 46. U. S. Dept. Agricult. Yearbook, 1909, p. 252. 47. Field— Bird-Lore, Vol. XV, No. 6, p. 356. 48. U. S. Dept. Agricult. Bull. No.
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