21.
 |  | Title: Chiricahua Peak Quadrangle, Cochise County, Arizona: Analytic Data and Geologic Sample Catalog (Geologic) by E. A. Du Bray, Douglas B. Yager, John S. Pallister ISBN: 9993355682 Publisher: U s Geological Survey Pub. Date: 01 January, 1994 List Price: $2.25 Amazon.com Price: $2.25 |
22.
 |  | Title: Introduction to Recreation and Leisure Services by Karla A. Henderson, John L. Hemingway, M. Deborah Bialeschki, H. Douglas Sessoms, Jan S. Hodges, Beth D. Kivel, H. Douglas Introduction to Leisure Services Sessoms ISBN: 1892132230 Publisher: Venture Pub Pub. Date: 01 August, 2001 List Price: $39.95 Amazon.com Price: $39.95 |
23.
 |  | Title: The Politics of Redistributing Urban Aid by Douglas J. Watson, John G. Heilman, Robert S. Montjoy ISBN: 0275947165 Publisher: Praeger Publishers Pub. Date: 30 January, 1994 List Price: $57.95 Amazon.com Price: $57.95 |
24.
 |  | Title: Latin American Urbanization (Urbanisation in Developing Countries) by Douglas S. Butterworth, John K. Chance ISBN: 052128175X Publisher: Cambridge University Press Pub. Date: 19 February, 1981
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