ASTM Committee D-18 on Soil and Rock, Symposium on Rock Classification Systems for Engineering Purposes, & Kirkaldie, L. (1988). Rock classification systems for engineering purposes. ASTM.
Chicago Style (17th ed.) CitationASTM Committee D-18 on Soil and Rock, Symposium on Rock Classification Systems for Engineering Purposes, and Louis Kirkaldie. Rock Classification Systems for Engineering Purposes. Philadelphia, PA: ASTM, 1988.
MLA (9th ed.) CitationASTM Committee D-18 on Soil and Rock, et al. Rock Classification Systems for Engineering Purposes. ASTM, 1988.
Warning: These citations may not always be 100% accurate.