TY  - BOOK
AU  - George Usher
TI  - Textbook of practical biology
U1  - 574 
PY  - 1970///
CY  - London
PB  - Constable and Co Limited
N1  - George Usher: Textbook of practical biology.  London.  Constable and Co Limited, 1970.--(574USH)
ER  -