حياة الطبيعه. من نحن

Extinction Web Page Class Notes	Proc Natl Acad Sci USA
Land Use History of North America	Journal of the Atmospheric Sciences

طبيعة

Hugh Anderson, Bernard Walter March, 28 1997.

25

طبيعة: Land Use History of North America
طبيعة: Retrieved on November 3, 2016
حياة الطبيعة : مشتل نباتات: Reston, VA: Department of the Interior, Geological Survey

Fundamentals of Physical Geography 2nd Edition
"Mass extinctions in the marine fossil record"	Global environment outlook 3 : past, present and future perspectives

من نحن

National Institute of Standards and Technology.

حياة الطبيعة : مشتل نباتات: "Natural variability of atmospheric temperatures and geomagnetic intensity over a wide range of time scales"
حياة الطبيعة : مشتل نباتات: ; Spoolman, Scott September 28, 2007
من نحن: Philos Trans R Soc Lond B Biol Sci

Philos Trans R Soc Lond B Biol Sci	The Brown University News Bureau
Philos Trans R Soc Lond B Biol Sci	Schopf, JW, Kudryavtsev, AB, Czaja, AD, and Tripathi, AB

طبيعة

Status and Trends of the Nation's Biological Resources.

8

من نحن: Proc Natl Acad Sci USA
من نحن: The Brown University News Bureau
من نحن: Philos Trans R Soc Lond B Biol Sci