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Showing all records for Author Name: Robbins, R. Robert (Ralph Robert) (Listed numerically by ISBN) 0292750641 - Modern astronomy : an activities approach / by R. Robert Robbins and Mary Kay Hemenway ; with contributions from William H. Jefferys ; illustrations by Patricia Cornelison. 0471584371 - Discovering astronomy / R. Robert Robbins, William H. Jefferys, Stephen J. Shawl. 0471832111 - Discovering astronomy / R. Robert Robbins, William H. Jefferys.