Forbush, E. H. (1907). Useful birds and their protection. Containing brief descriptions of the more common and useful species of Massachusetts, with accounts of their food habits, and a chapter on the means of attracting and protecting birds. s.n.
Citace podle Chicago (17th ed.)Forbush, Edward Howe. Useful Birds and Their Protection. Containing Brief Descriptions of the More Common and Useful Species of Massachusetts, with Accounts of Their Food Habits, and a Chapter on the Means of Attracting and Protecting Birds. [Boston, Mass: s.n, 1907.
Citace podle MLA (9th ed.)Forbush, Edward Howe. Useful Birds and Their Protection. Containing Brief Descriptions of the More Common and Useful Species of Massachusetts, with Accounts of Their Food Habits, and a Chapter on the Means of Attracting and Protecting Birds. s.n, 1907.