00688cam a2200217 4500 377762062 TxAuBib 20170331120000.0 141014s2014||||||||||||||||||||||||eng|u 47108 Project Gutenberg PGUSA eng TxAuBib Walker, A. S, 1942-, (Alta Sharon.) Deserts [Gutenberg] : Geology and Resources / A. S. Walker. Project Gutenberg, 2014. Public domain in the USA. Text. Hazardous geographic environments -- Research. Deserts -- Research. Desertification -- Research. http://www.gutenberg.org/ebooks/47108 TXTLL