The United Nations Food and Agriculture Organization (FAO) book Grassland Resource Assessment for Pastoral Systems, FAO Plant Production and Protection Paper 162, was written by me. It includes case studies illustrating the application and development of RAPS software.
An on-line version of the book may be viewed at the: FAO Site
A review of the book Grassland Resource Assessment for Pastoral Systems by Peter S. Harris is in the Journal of Range Management, Vol. 55, No. 3 (May, 2002), pp. 312-313 . (possibly via: page 1 and page 2)