investigation of the performance of six small septic tanks -/ E. Robert Baumann, Harold E. Babbit.
Baumann, E. Robert.
investigation of the performance of six small septic tanks -/ E. Robert Baumann, Harold E. Babbit. - Urbana, Illinois : University of Illinois, Engineering Experiment Station - 75 p. - Bulletin series, No. 409. .
investigation of the performance of six small septic tanks -/ E. Robert Baumann, Harold E. Babbit. - Urbana, Illinois : University of Illinois, Engineering Experiment Station - 75 p. - Bulletin series, No. 409. .