TY  - BOOK
AU  -  Silayo,Valerian C.K.
ED  -  AGROTEC.
ED  -  United Nations Development Program.
TI  -  Small biogas plants : :  design, management and use / 
PY  - 1992///
CY  -  Harare : 
PB  -  AGROTEC, 
KW  -  Gobar gas
ER  -