Roger K. Allen:
Blue-gray_Gnatcatcher_Lost_Maples_SP-9761
Roger K. Allen:
Buttonbush_Bumble_Bee_Lost_Maples_SP-9690
Roger K. Allen:
Night_Sky_South_Llano_River_SP-0485
Roger K. Allen:
Night_Sky_Lost_Maples_SP1-9618
Roger K. Allen:
Roadrunner_Caprock_Canyons_SP-0252
Roger K. Allen:
Roadrunner_Caprock_Canyons_SP-0254
Roger K. Allen:
South_Llano_River_SP-0398
Roger K. Allen:
Bison_Caprock_Canyons_SP-0118
Roger K. Allen:
Bison_Caprock_Canyons_SP-0114
Roger K. Allen:
Eastern_Boundary_Caprock_Canyon_SP-0284
Roger K. Allen:
Gypsum Strata
Roger K. Allen:
Gypsum_Strata_Caprock_Canyon_SP-0093