EHLERS, VICTOR M.
Municipal and rural sanitation, by Victor M. Ehlers & Ernest W. Steel. 3d ed.
EHLERS, VICTOR M. Municipal and rural sanitation, by Victor M. Ehlers & Ernest W. Steel. 3d ed. © 18Aug43; A175022. Victor M. Ehlers, Jr. (C) & Mable Claire Steel (W); 26Jul71; R509667.
Victor M. Ehlers, Jr.|C||Mable Claire Steel|W