University of Illinois Urbana-Champaign

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Thumbnail for A study of factors affecting the efficiency and design of farm septic tanks
A study of factors affecting the efficiency and design of farm septic tanks
Lehmann, Emil Wilhelm; Buswell, Arthur M.; Kelleher, Raymond Charles

Thumbnail for A study of factors affecting the efficiency and design of farm septic tanks
A study of factors affecting the efficiency and design of farm septic tanks
Lehmann, Emil Wilhelm; Buswell, Arthur M.; Kelleher, Raymond Charles