Organ Pipe Cactus National Monument, Ecological Monitoring Program, annual report 1993 /
The Division of Natural and Cultural Resources Management, Organ Pipe Cactus National Monument.

APA Citation

National Park Service Cooperative Park Studies Unit (Tucson, A., United States. National Park Service., Organ Pipe Cactus National Monument (Ariz.). Division of Natural and Cultural Resources Management. (1995). Organ Pipe Cactus National Monument, Ecological Monitoring Program, annual report 1993. Tucson, Ariz.: National Biological Service, Cooperative Park Studies Unit, The University of Arizona .

MLA Citation

National Park Service Cooperative Park Studies Unit (Tucson, Ariz.), United States. National Park Service, and Organ Pipe Cactus National Monument (Ariz.). Division of Natural and Cultural Resources Management. Organ Pipe Cactus National Monument, Ecological Monitoring Program, Annual Report 1993. Tucson, Ariz.: National Biological Service, Cooperative Park Studies Unit, The University of Arizona , 1995.

Warning: These citations may not always be complete (especially for serials).