TY  - BOOK
AU  - Martin,Bernard Herman
TI  - How birds keep warm in winter,
AV  - PZ10.M442 
PY  - 1964///
CY  - New York
PB  - Holt, Rinehart and Winston
KW  - Birds
KW  - Juvenile literature
UR  - http://www.archive.org/details/howbirdskeepwarm00mart
UR  - http://www.openlibrary.org/books/OL24524200M
ER  -