Ingram, W. T., Haney, P. D., Howd, A. I., Kroeze, H. A., Lee, D. B., Spies, K. H., . . . Weibel, S. R. (1951). Engineering Section: Rural Sanitation (A Progress Report).

Ingram, William T., Paul D. Haney, Albert I. Howd, H. A. Kroeze, David B. Lee, Kenneth H. Spies, Earl W. Sudderth, Jerome H. Svore, och Samuel R. Weibel. Engineering Section: Rural Sanitation (A Progress Report). 1951.

Ingram, William T., et al. Engineering Section: Rural Sanitation (A Progress Report). 1951.