Sewage sludge:
Treatment and utilization of sludge, by Alexander Elsner; The drying of sludge, by Fr. Spillner, tr. by Kenneth and Rose S. Allen; Operation of mechanical sewage plants, by Fr. Spillner and Mr. Blunk, tr. by Emil Kuichling; Sludge treatment in the United States, by Kenneth Allen.
APA Citation
Kuichling, E., Allen, R. Snitzer., Allen, K., Blunk, H. Christian., Spillner, F. Gustav., Elsner, A. (1912). Sewage sludge. New York: McGraw-Hill Book Company.
MLA Citation
Elsner, A, et al.. Sewage Sludge. New York: McGraw-Hill Book Company, 1912.
Warning: These citations may not always be complete (especially for serials).