KeyMM, (eds): Occupational Diseases: A Guide to Their Recognition, rev ed.Washington, DC, US Department of Health, Education, and Welfare, 1977, pp 12–13, 41, 86, 97, 106, 312, 367, 435, 437, 461.
2.
ProctorNHHughesJP: Chemical Hazards of the Workplace. Philadelphia, JB Lippincott Co, 1978.
3.
Tabors Cyclopedic Medical Dictionary. Philadelphia, FA Davis Co, 1977, p H-50.
4.
ZenzC, (ed): Occupational Medicine: Principles and Practical Applications. Chicago, Year Book Medical Publishers, 1975.
