How to know the butterflies; a manual of the butterflies of the eastern United States
- publisher: New York, D. Appleton and company
- creator: Comstock, John Henry, 1849-1931 Comstock, Anna Botsford, 1854-1930, joint author
- contributor: Comstock, Anna Botsford, 1854-1930, joint author.
- Keyword: Butterflies United States.
- years: 1904.
- pages: 311 p.
- class: QL549
- download: pdf file