International Geological correlation programme. (2001). Geological correlation. IGCP.
Чикаго маягийн жагсаалтInternational Geological correlation programme. Geological Correlation. Paris: IGCP, 2001.
MLA ишлэлInternational Geological correlation programme. Geological Correlation. IGCP, 2001.
Warning: These citations may not always be 100% accurate.