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1Published 1964Subjects: “...Playas Texas High Plains....”
Conference Proceeding Book -
2Published 1963Subjects: “...Playas Texas High Plains....”
Conference Proceeding Book -
3Published 1972Subjects: “...Playas Great Plains Congresses....”
Conference Proceeding Book -
4Published 1981Subjects: “...Playas Texas Congresses....”
Government Document Conference Proceeding Book -
5Published 1994Subjects: “...Playas Southwestern States Congresses....”
Conference Proceeding Book