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1Published 1979Subjects: “...Nature study....”
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7Published 1996Subjects: “...Nature trails Texas Monument Hill State Historical Park....”
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8Published 1978Subjects: “...Nature conservation Texas....”
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10Published 1973Subjects: “...Nature conservation Texas....”
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12Published 1988Subjects: “...Nature trails Texas Tyler State Park....”
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13Published 1988Subjects: “...Nature trails Texas Palmetto State Park....”
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14Published 1983Subjects: “...Nature conservation Texas....”
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15Published 1988Subjects: “...Nature trails Texas Caddo Lake State Park....”
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16Published 1999Subjects: “...Nature trails Texas Aransas National Wildlife Refuge....”
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17by Davis, Walt, 1942-Subjects: “...Perot Museum of Nature and Science History....”
Published 2016
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18by Williams, John E.Subjects: “...Nature trails Texas Seminole Canyon State Historical Park....”
Published 1991
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19Published 1989Subjects: “...Nature trails Texas Lake Brownwood State Recreation Area....”
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