Task directive
Subtitle: adjacent land study : Grand Canyon National Park, Arizona
Contributors: United States.   Forest Service; United States.   National Park Service
Publisher: National Park Service, Bureau of Land Management [and] Forest Service
Published: 1978
Place of publication: Grand Canyon, Ariz
Language: eng
Number of pages: 30
Subjects: Boundaries; Conservation of natural resources; Natural resources
Notes: "May 1978."

Title from cover.