TY  - BOOK
AU  - Ehrlich,Paul R.
TI  - How to know the butterflies: illustrated keys for determining to species all butterflies found in North America, north of Mexico, with notes on their distribution, habits, and larval food, and suggestions for collecting and studying them
T2  - The Pictured key nature series
AV  - QL548 .E45
U1  - 595.789 
PY  - 1961///]
CY  - Dubuque, Iowa
PB  - W. C. Brown Co.
KW  - Butterflies
KW  - North America
KW  - Identification
KW  - Local
N1  - 920403
ER  -