Kapur (zaman): Perbedaan antara revisi
Konten dihapus Konten ditambahkan
Baris 7:
== Bacaan lanjutan ==
*Stephen hawking, the greaytest barrier.›
* Neal L Larson, Steven D Jorgensen, Robert A Farrar and Peter L Larson. ''Ammonites and the other Cephalopods of the Pierre Seaway''. Geoscience Press, 1997.
* Ogg, Jim; June, 2004, ''Overview of Global Boundary Stratotype Sections and Points (GSSP's)'' http://www.stratigraphy.org/gssp.htm Accessed April 30, 2006.
| |||