TY  - BOOK
AU  - Nutting, William Brown
TI  - Basic natural history: a procedural approach to conservation, perspective, ecology 
AV  - QH 53 N8
PY  - 1972///
CY  - New York
PB  - Macmillan
KW  - Historia natural
KW  - Estudio y enseñanza
ER  -