TY  - BOOK
AU  - Ridgway, Robert.
TI  - The birds of North and middle America ; a descriptive catalogue..
T2  - Bulletin of the United States National Musseum
U1  - 598.2 
PY  - 1901///-
CY  - Washington
PB  - Government Printing Office
KW  - Aves
KW  - América del Norte
ER  -