1. Biological wastewater treatment systems : theory and operation
Author: Horan, N. J.
Library: Central Library of Sharif University of Technology (Tehran)
Subject: ، Sewage-- Purification-- Biological treatment
Classification :
TD
755
.
H66
1990
2. Biological weste water treatment systems
Author: / N. J. Horan
Library: Tehran University, technical faculty libraries 1 (Tehran)
Subject: Sewage--purification--biological treatment
Classification :
TD
755
.
H66
1989
