Bark beetles in California conifers :
are your trees susceptible? /
United States Department of Agriculture.
APA Citation
United States. Forest Service. Pacific Southwest Region. (2014). Bark beetles in California conifers: are your trees susceptible? [San Francisco, Calif.]: Forest Service, United States Department of Agriculture, Pacific Southwest Region.
MLA Citation
United States. Forest Service. Pacific Southwest Region. Bark Beetles In California Conifers: Are Your Trees Susceptible? [San Francisco, Calif.]: Forest Service, United States Department of Agriculture, Pacific Southwest Region, 2014.
Warning: These citations may not always be complete (especially for serials).