TY  - BOOK
AU  - Sibley, Charles G.
AU  - Monroe, Burt L.
TI  - Distribution and taxonomy of birds of the world /Charles G. Sibley and Burt L. Monroe
SN  - 0300049692
U1  - 598.292 
PY  - 1990///
CY  - New Haven
PB  - Yale Univ.
ER  -