TY  - BOOK
AU  - Third European Seminar for Sanitory engineers, 27 October-1 November, 1952, London
TI  - Design and operation of septic tanks: third European seminar for sanitary engineers: World Health Organization, Geneva
U1  - 628.742 
PY  - 1953///
CY  - Geneva
PB  - World Health Organization
ER  -