http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Outdoor recreation for 21st century America
a report to the nation, the national survey on recreation and the environment
the national survey on recreation and the environment
National survey on recreation and the environment
H. Ken Cordell, principal author ... [et al.].
Includes bibliographical references and statistics.