TY  - SER
AU  - Grant, P. R., Boag, P. T., Schluter, D.
TI  - A bill color polymorphism in young Darwin's finches
U1  - 598.883598.883 
PY  - 1979///
KW  - FI
KW  - A bill color polymorphism in young Darwin's finches
KW  - Darwin's finch, beak, color, Galápagos
KW  - Pinzón de Darwin, pico, color, Galápagos
N2  - BIB Now: 3322
ER  -