Julia Arias-Martorell & M. Ashraf Aziz 
Photographic and Descriptive Musculoskeletal Atlas of Gibbons and Siamangs (Hylobates) [PDF ebook] 
With Notes on the Attachments, Variations, Innervation, Synonymy and Weight of the Muscles

This book is the first photographic and descriptive musculoskeletal atlas of Hylobates, and adopts the same format as the photographic atlas of Gorilla published by the same authors in 2010. These two books are part of a series of monographs that will set out the comparative and phylogenetic context of the gross anatomy and evolutionary history of