National park concessions policies and management :
oversight hearings before the Subcommittee on National Parks and Public Lands of the Committee on Interior and Insular Affairs, House of Representatives, One Hundred First Congress, second session ... hearings held in Washington, DC, May 24, 1990, October 11, 1990.

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Item Link Original Source
Full view   University of Michigan
Full view   4.In 8/14:101-43 Pennsylvania State University