Public health engineering : a text book of principles of environmental sanitation - Phelps, Early Bernard, 1876- (New York : John Wiley, 1958)
Contents. v.1. pt. 1. : The air contact, with a chapter on insects and inscets control by Harry D.f Pratt. - p. 2. The water contact, by author in collaboration with Clarence J. Velz. v. 2. - p.3. The food contact
London, Chapman and Hall
"Reference" at end of some chapters
Keywords: Roofs, Suspension