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The value of time and the demand for outdoor recreation
Anderson, Robert A., (1974)
The demand for outdoor recreation
Gosse, Lois Eini Heikkila, (1970)
The value of reservoir recreation
Romm, Jeff, (1969)
Veblen's possible influence on the new deal land-utilization program as evidenced by his student Claud Franklin Clayton
Vaughn, Gerald F., (1999)
[Rezension von: MacNeill, Jim, ..., Beyond interdependence]
Vaughn, Gerald F., (1992)
Extending William M. Dugger's changing concepts of inquiry : Ayers Brinser on the continuation of progress
Vaughn, Gerald F., (1996)