TY  - BOOK
AU  - Rachel M.Ayres & D.Duncon Mara
TI  - Andysis of waste water for use in agriculture:A Laboratory Manual of Parasitological & Bacteriological Techqniques
SN  - 92 4 154484 8
U1  - 610.284 
PB  - Geneva:World Health Organization
N1  - Don:WHO
ER  -