Books by Robert C. Spear:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Spear, Robert C.: Morbidity patterns among heavy equipment operators exposed to whole-body vibrations 1975 : followup to a 1974 study (U.S. Dept. of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health, Division of Laboratories and Criteria Development ;, 1976), also by Thomas H. Milby and National Institute for Occupational Safety and Health. Division of Laboratories and Criteria Development (page images at HathiTrust)- Spear, Robert C: Relationship between whole body vibration and morbidity patterns among heavy equipment operators (U.S. Dept. of Health, Education, and Welfare, Center for Disease Control, National Institute for Occupational Safety and Health, Division of Laboratories and Criteria Development, 1974), also by Thomas H Milby (page images at HathiTrust)
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