Activated sludge studies, 1920-1922.
(Printed by authority of the state of Illinois)
APA Citation
Illinois State Water Survey. (1923). Activated sludge studies, 1920-1922. Urbana, Illinois. [Springfield: Illinois state register printers.
MLA Citation
Illinois State Water Survey. Activated Sludge Studies, 1920-1922. Urbana, Illinois. [Springfield: Illinois state register printers, 1923.
Warning: These citations may not always be complete (especially for serials).