The Sewage Question: Letters, With Appendix, Explaining Shortly the Several Processes That Have Been Adopted for the Treatment and Utilization of Sewage, With Special Reference to the Selection and Preparation of Land for Irrigation

The Sewage Question: Letters, With Appendix, Explaining Shortly the Several Processes That Have Been Adopted for the Treatment and Utilization of Sewage, With Special Reference to the Selection and Preparation of Land for Irrigation