Alan Cressler:
Punkin Cave, Edwards County, Texas, Manuel Beers and Philip Rykwalder 1
Alan Cressler:
Punkin Cave, Edwards County, Texas, Paul Aughey, night shot 1
Alan Cressler:
Punkin Cave, Edwards County, Texas, Manuel Beers 1
Alan Cressler:
Punkin Cave, Edwards County, Texas, Doug Strait 1
Alan Cressler:
Punkin Cave, Edwards County, Texas, Manuel Beers and Philip Rykwalder 2
Alan Cressler:
Devils River, Devils River State Natural Area, Val Verde County, Texas 3
Alan Cressler:
Devils River, Devils River State Natural Area, Val Verde County, Texas 1
Alan Cressler:
Devils River State Natural Area, Val Verde County, Texas, Night Time Thunderstorm 2
Alan Cressler:
Eremobates species, Devils River State Natural Area, Val Verde County, Texas 1
Alan Cressler:
Eremobates species, Devils River State Natural Area, Val Verde County, Texas, Manuel Beers 1
Alan Cressler:
Dichopetala species, Devils River State Natural Area, Val Verde County, Texas 3
Alan Cressler:
Shelter 888, Pecos River Style Pictographs, Val Verde County, Texas 2
Alan Cressler:
Shelter 888, Pecos River Style Pictographs, Val Verde County, Texas 6
Alan Cressler:
Shelter 888, Pecos River Style Pictographs and other Prehistoric Pictographs, Val Verde County, Texas 8
Alan Cressler:
Shelter 888, Pecos River Style Pictographs, Val Verde County, Texas 11
Alan Cressler:
Shelter 888, Pecos River Style Pictographs, Val Verde County, Texas 12
Alan Cressler:
Shelter 888, Pecos River Style Pictographs, Val Verde County, Texas 14
Alan Cressler:
Shelter 888, Pecos River Style Pictographs, Val Verde County, Texas 16
Alan Cressler:
Shelter 888, Pecos River Style Pictographs, Val Verde County, Texas 20
Alan Cressler:
U.S. 90 Bridge, Over Pecos River, Val Verde County, Texas, Manuel Beers 1
Alan Cressler:
U.S. 90 Bridge, Over Pecos River, Val Verde County, Texas 1
Alan Cressler:
Blair Pittman's House, Villa de la Mina, Brewster County, Texas 1
Alan Cressler:
Blair Pittman's House, Villa de la Mina, Brewster County, Texas 3
Alan Cressler:
Cinnabar, Waldron Deep Mine, Villa de la Mina, Brewster County, Texas 1
Alan Cressler:
Calcite Crystals, Waldron Deep Mine, Villa de la Mina, Brewster County, Texas 7
Alan Cressler:
Calcite Crystals, Waldron Deep Mine, Villa de la Mina, Brewster County, Texas 3
Alan Cressler:
Calcite Crystals, Waldron Deep Mine, Villa de la Mina, Brewster County, Texas 1
Alan Cressler:
Night Shot, Villa de la Mina, Terlingua Area, Brewster County, Texas 3
Alan Cressler:
Terlingua Sinkhole, Terlingua, Brewster County, Texas, Manuel Beers 7
Alan Cressler:
Terlingua Sinkhole, Terlingua, Brewster County, Texas, Manuel Beers 8
