source: 1908, Charles F Breitzke - The Investigation of Sanitary Conditions of the Gowanus Canal , page 246 Massachusetts Institute of Technology - Sanitary Research Laboratory and Sewage Experiment, Contributions from Sanitary Research Symposium
source: 1908, Charles F Breitzke - The Investigation of Sanitary Conditions of the Gowanus Canal , page 246 Massachusetts Institute of Technology - Sanitary Research Laboratory and Sewage Experiment, Contributions from Sanitary Research Symposium