This volume results from an experiment in data retrieval. During the initial stage of the Coniferous Forest Biome the authors were asked to provide access to the literature on mammals as it pertained to the interests of the Biome investigation. One constraint was that the total number of entries should not much exceed 1000. Another was that no new items would be added after the project was undertaken (1971). In order to keep the total number of items within bounds, it was necessary to choose. In choosing, we emphasized the geographic location of the Biome Investigation, the Pacific Northwest, and the emphasis of most Biome studies, productivity and effects of forest manipulation. We attempted to include all mammal papers that would be useful both to vertebrate zoologists working within the fields of Biome interest and to their colleagues in other disciplines. Therefore both methodological and substantive papers are included. Taxonomy is derived from Ingles (1965) and, where necessary, from Walker et al. (1964).