BOOKhttps://ama.dev.pubfactory.com/display/book/9780899705538/9780899705538.xmlAMA Guides® to the Evaluation of Permanent Impairment, Fourth Edition, 19932026-03-16https://ama.dev.pubfactory.com/display/book/9780899705538/9780899705538.pdf2026-03-16AMA Guides® to the Evaluation of Permanent Impairment, Fourth Edition, 1993