Gaya APA

ECHENFELDER, W.Wesley. (0). Activated sludge treatment of industrial wastewater . : .

Gaya Chicago

ECHENFELDER, W.Wesley. Activated sludge treatment of industrial wastewater. : , 0. Buku.

Gaya MLA

ECHENFELDER, W.Wesley. Activated sludge treatment of industrial wastewater. : , 0. Buku.

Gaya Turabian

ECHENFELDER, W.Wesley. Activated sludge treatment of industrial wastewater. : , 0. Buku.