TY  - BOOK
AU  - Peterson,Roger Tory
AU  - Chalif,Edward L.
TI  - A field guide to mexican birds: Mexico, Guatemala, Belize, El Salvador 
T2  - The Peterson field guide series
SN  - 9780395975145
AV  - QL686 P47
PY  - 1973///
CY  - Boston
PB  - Houghton mifflin company
KW  - Aves
KW  - México
KW  - Identificación
KW  - América Central
N1  - Originalmente publicado: The field guide to Mexican birds : field marks of all species found in Mexico, Guatemala, Belize (British Honduras), El Salvador. 1973
ER  -