[Illustration: _Deserts of the Southwest are not desolate expanses of sand as many persons believe. This photograph, showing vegetation in Organ Pipe Cactus National Monument, Arizona, is a typical illustration of the variety and density of plant growth in the Sonoran desert area of northwestern Mexico and southwestern Arizona._] Published in co-operation with the National Park Service by the Southwest Parks and Monuments Association in keeping with one of its objectives, to provide accurate and authentic information about the Southwest.…
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