The common butterflies :
an outline for butterfly study.

APA Citation

Comstock, A. Botsford. (1917). The common butterflies: an outline for butterfly study. Ithaca, N.Y.: Comstock Pub. Co..

MLA Citation

Comstock, Anna Botsford, 1854-1930. The Common Butterflies: an Outline for Butterfly Study. Ithaca, N.Y.: Comstock Pub. Co., 1917.

Warning: These citations may not always be complete (especially for serials).