1) National Agricultural Statistics Service

2) National Association of Secretaries of State.

In 2002 production fell to 6.41 million tons, according to the National Agricultural Statistics Service (NASS).

According to the USDA's National Agricultural Statistics Service, in 2011 Alaska had 680 farms totaling 880,000 acres.

United States Department of Agriculture, National Agricultural Statistics Service. "Statistics of Cattle, Hogs, and Sheep." Washington, D.C.: 2002.

As of 2002, there were 1,255,843 cattle and calves in Wyoming according to the United States Department of Agriculture, National Agricultural Statistics Service.