APA

VICTOR M. BHLERS - ERNEST W STEEL, .MUNICIPAL and RURAL SANITATION. : .

Chicago

VICTOR M. BHLERS - ERNEST W STEEL, .MUNICIPAL and RURAL SANITATION. : .

Harvard

VICTOR M. BHLERS - ERNEST W STEEL, .MUNICIPAL and RURAL SANITATION. : .

MLA

VICTOR M. BHLERS - ERNEST W STEEL, .: . .