Indian standards institution . ISI. (1969). Method of test for toughness of natural building stones (1.). Indian standards institution.
Chicago Edition CitationIndian standards institution . ISI. Method of Test for Toughness of Natural Building Stones. 1. New Delhi: Indian standards institution, 1969.
MLA Edition CitationIndian standards institution . ISI. Method of Test for Toughness of Natural Building Stones. 1. Indian standards institution, 1969.