TY  - BOOK
AU  - Phelps,Early Bernard
TI  - Public health engineering: a text book of principles of environmental sanitation 
U1  - 628 
PY  - 1958///
CY  - New York
PB  - John Wiley
KW  - Roofs, Suspension
N1  - London, Chapman and Hall; "Reference" at end of some chapters; 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
ER  -