AN EXAMINATION OF THE THEOREM OF ALLEN HAZEN THAT FOR EVERY DEATH FROM TYPHOID FEVER AVOIDED BY THE PURIFICATION OF PUBLIC WATER SUPPLIES TWO OR THREE DEATHS ARE AVOIDED FROM OTHER CAUSES

W. T. Sedgwick, S. MacNutt
1908 Science  
doi:10.1126/science.28.711.215 pmid:17739468 fatcat:25vulg267na3njyvo5wio5j6he