This document is a guide to sources of information on endangered species distribution in Michigan. It was prepared for CETA (Comprehensive Employment and Training Act) students who will collect the documents. The guide is divided into three major sections. The first section includes an introduction (briefly discussing endangered, rare, threatened species and types of literature on the subject) and a historical overview of the development of natural history record-making in Michigan. The second section consists of eight chapters, an introductory chapter which introduces general sources and provides rationale for the strategies of their use, and chapters listing and discussing sources useful for researching endangered species in eight phyla listed by the Department of Natural Resources (mollusks, insects, fishes, amphibians/reptiles, birds, mammals, plants). A similar format of presenting materials in each chapter is used: handbooks, guides, texts; books/articles; indexes; journals; associations/agencies; Library of Congress Classification of materials; and a systematic presentation of species within each phylum. The third section is a series of directories useful for collecting current information. These include associations and agencies, Michigan college biology departments (which keep field records of local flora and fauna), and Michigan nature centers. (Author/JN)