Frank R. Spellman, "Occupational Safety and Health Simplified for the Industrial Workplace" English | ISBN: 1598888099 | 2015 | 480 pages | PDF | 10 MB
Industrial Hygiene Simplified : A Guide to Anticipation, Recognition, Evaluation, and Control of Workplace Hazards, Second Edition by Frank R. Spellman English | 2017 | ISBN: 1598889621 | 417 Pages | PDF | 2.2 MB