TY  - BOOK
AU  - Spratt, E. R. 
AU  - Spratt, A. V. 
TI  - General science: Biology  
U1  - 570 
PY  - 1948///
CY  - London
PB  - University Tutorial Press
KW  - Biology
KW  - Carbon cycle
KW  - Petunia plant
ER  -