Document 373evVz30eOrk00Nz351kbObJ

Reprinted from the Archives of Environments! Heelth July 1970 Volume 21 Copyright 1970, Americen Medicel Associetion ,v SCHEME Fibr articles and Ferruginous Bodies Methods for Quantitating Them and Some Results From the Lungs of City Dwellers Paul Gross, Mb; Jiri Tuma, ScD; and Robert T. P. deTreville. Mb, Scb, Pittsburgh SCF-FA-6450 8005 1427 I PRODUCED BY FORD