nam a22 7a 4500 24700 24700 170130b xxu||||| |||| 00| 0 eng d 0675075351 Q175 .H45 1975 Heimler, Charles H. 1975. Principles of Science / Charles H. Heimler, Charles D. Neal. 3rd ed. Columbus: Charles E. Merrill, 1975. xii, 516 p.: ill.; 26cm. includes bibliographical references and index. Science Charles D. Neal lcc BOOKS Q175 .H45 1975 32977