TY  - BOOK
AU  - Vollenweinder Richard A Ed.
TI  - Manual on methods for measuring primary production in aquaatic environmenrts
T2  - IBM handbook; 12
U1  - G:555:b6, L4 
PY  - 1969///
CY  - London
PB  - Blackwell scientific        
KW  - Biology
N1  - Appendix p
ER  -