Mexico D.F. Instituto Nacional de Invesigaciones Sobre Recursos Biotocios / Editorial Alhambra Mexicana, 1985. 122p., b&w illustrations from photography and other media, softbound in 9x6 inch glossy decorated wraps. The initial gutter shows some binder's glue and lower two inches of several leaves are not fastened: a production flaw that does not affect basic soundness of the item. cover is slightly toned, generally sound and clean, a good copy.