00476pamaa2200157 4500 0000014455 20130723090000.0 0071009027 550.2 OJA QE41 OJA 1991 OJAKANGAS Schaum's outline of theory and problems of introductory geology Richard W. Ojakangas. New York: McGraw Hill, 1991. vii, 294p.: 27cm. Schaum's outline series Geology -- Problems, exercises, etc