TY  - BOOK
AU  - Spratt, E. R. 
AU  - Spratt, A. V. 
TI  - Textbook of biology
U1  - 570 
PY  - 1943///
CY  - London
PB  - University tutorial press
KW  - Biology
KW  - Embryology
KW  - Cell division
ER  -