TY  - BOOK
AU  - Laak
TI  - Wastewater engineering desing for unsewered areas
SN  - 87762-462-3
PY  - 1986///
CY  - Basel, CH
PB  - Technomic Publishing Co.
KW  - Águas residuais
KW  - Tratamento
KW  - TD430
ER  -