The Complete Calculus of Body Gauges is a seminal book written by Lengemann, F. W. (Frederick W.); Woodburn, John H., which covers the subject of measuring internal human exposure. The authors describe in detail the principles of body meters, devices that measure the amount of accumulated radioactive substances in the human body. The book examines the methods and results of research in the field of radiation monitoring and dosimetry. This book will be a useful reference for specialists in the field of nuclear engineering, as well as for anyone interested in radiation safety.