Spencer, E. W. Basic concepts of historical geology.
Chicago Edition CitationSpencer, Edgar Winston. Basic Concepts of Historical Geology.
MLA引文Spencer, Edgar Winston. Basic Concepts of Historical Geology.
警告:这些引文格式不一定是100%准确.
Spencer, E. W. Basic concepts of historical geology.
Chicago Edition CitationSpencer, Edgar Winston. Basic Concepts of Historical Geology.
MLA引文Spencer, Edgar Winston. Basic Concepts of Historical Geology.