A citation study investigated the coverage by abstracting and indexing services of literature dealing with the environmental effects of the forest and forest products industries, the impact of man on the forest ecology, and methods for maximizing forest tree utilization. A search of nine secondary sources (abstracting and indexing services) produced 961 citations to documents published from 1970 through 1972 within the subject parameters. Citations unique to a single secondary source accounted for 75% of the citations. The most productive secondary source, the "Bibliogrpahy of Agriculture," indexed 48% of all citations found. The greatest overlap occurred between the "Bibliography of Agriculture" and "Forestry Abstract." The median indexing delay was seven months. Relevant materials were found in 292 journals, but 62 journals were found to be the most productive. Only 64% of these core journals were found to emphasize forestry or forest products. Tables of data compiled in the study and a listing of the 1,348-item bibliographic data base used are appended. (Author/PF)