6Sewerage and Sewage Treatment (pt. 2)
17Standard methods for the examination of water and sewage (pt. 2)
7Sewerage and Sewage Treatment (pt. 3)
18Standard methods for the examination of water and sewage (pt. 3)
8Sewerage and Sewage Treatment (pt. 4)
19Practical Methods of Sewage Disposal for Residences, Hotels and Institutions (pt. 1)
9Sewerage and Sewage Treatment (pt. 5)
20Practical Methods of Sewage Disposal for Residences, Hotels and Institutions (pt. 2)
10Sewerage and Sewage Treatment (pt. 6)
21Practical Methods of Sewage Disposal for Residences, Hotels and Institutions (pt. 3)
11Sewerage and Sewage Treatment (pt. 7)