TY  - BOOK
AU  - Burt,William Henry
TI  - A field guide to the mammals: giving field marks of all species found north of the mexican boundary 
U1  - 599.097 
PY  - 1959///, c1952
CY  - Boston, MA.
PB  - Houghton Mifflin
KW  - Mamíferos
KW  - América del Norte
N1  - Incluye bibliografía
ER  -