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	1.	No cover image available USPHS/NIOSH Membrane Filter Method for Evaluating Airborne Asbestos Fibers : / Nelson A. Leidel ...[et al.] by Leidel, Nelson A Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Washington, D.C. : United States Government Printing Office, 1979 Availability: Items available for loan: National Library of India (1)Call number: U.S 356.1660973 M 512. Place hold Request article Save to lists
	2.	No cover image available USPHS/NIOSH membrane filler method for evaluating airborne asbestos fibers / Nelson A. Leidel ... [et al.] by Leidel, Nelson A [jt. aut] United States. Department of Health, Education, and Welfare Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Washington, D.C. : U.S. Government Printing Office, 1979 Availability: Items available for loan: National Library of India (1)Call number: U.S 363.179 Us 6. Place hold Save to lists
	3.	No cover image available Exposure measurement action level and occupational environmental variability / by Nelson A. Leidel, Kenneth A. Busch and William E. Crousc by Leidel, Nelson A Crousc, William E [jt. Aut] Busch, Kenneth A [jt.aut] United States. Department of Health, Education, and Welfare Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Washington, D. C. : United States Government Printing Office, 1975 Availability: Items available for loan: National Library of India (1)Call number: U.S 363.1790973 L 532. Place hold Request article Save to lists

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