Lehigh Portland Cement Company, Union Bridge, Maryland.

[Atlanta, Ga.?] : U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health ; [Springfield, Va. : National Technical Information Service, distributor, 1997]

iv, 17 p. ; 28 cm.

English

June 01, 2002

Includes bibliographical references (p. 10-11).