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Environmental issues and problems :
water /
prepared by Robert W. Schwille ... [et al.].

APA Citation

Schwille, R. W., Pennsylvania. Bureau of Curriculum Services. (1974). Environmental issues and problems: water. Harrisburg: Bureau of Curriculum Services, Pennsylvania Dept. of Education.

MLA Citation

Schwille, Robert W, and Pennsylvania. Bureau of Curriculum Services. Environmental Issues And Problems: Water. Harrisburg: Bureau of Curriculum Services, Pennsylvania Dept. of Education, 1974.

Warning: These citations may not always be complete (especially for serials).