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National Center for Preservation Technology and Training Technology Serving the Future of America’s Heritage www.ncptt.nps.gov/products © 2008 NCPTT Effect of Water on Lower Pecos River Rock Paintings in Texas Rock Art Research: Journal of the Australian Rock Art Research Association (AURA) and International Federation of rock Art Organizations (IFRAO) - Elmo J. Mawk and Marvin W. Rowe Grant Number: 1998-22 Image by mlhradio on Flickr
