The Activated Sludge Process by Randy Junkins (1983, HC)

Collective Data on the Treatment of Sewage by the Activated Sludge Process

The Activated Sludge Process of Sewage Treatment; A Bibliography of the Subject

The Treatment of Stock Yard's Sewage by the Activated Sludge Process: A Thesis

Some Factors in the Purification of Sewage by the Activated Sludge Process

Collective Data on the Treatment of Sewage by the Activated Sludge Process

Some Factors in the Purification of Sewage by the Activated Sludge Process

Activated Sludge Process Using Pure Oxygen by U.S. Environmental Protection Agen