Zustand: very good. with contributions by Ludington, S. D. A. R. Wallace, W. H. Fiction, K. S. Smith, J. T. Nash, N. K. Foley, R. E. Van Loenen, B. R. berger, and G. Green: from the front cover, "This report presents prototype mineralenvironmental assessments of the State of Colorado and the San Juan National Forest. The following pages will show examples of how geologic information can be used to help predict and prevent adverse environmental effects of mineralresource development." DZ4. black comb, 11" x 8.5", illustrated, unnumbered pages.