Victory Pub. Co.,

Craft course Publishers,

Petersen,

Wyoming State Geological Survey,

IDG Books,

U.S. Dept. of Health, Education, and Welfare, Public Health Service, National Institutes of Health ; For sale by the Supt. of Docs., U.S. G.P.O.

U.S. Dept. of Health, Education, and Welfare, Public Health Service, National Institutes of Health, National Library of Medicine ; Supt. of Docs., U.S. G.P.O., distributor,

Social Security Board : For sale by the Supt. of Docs., U.S. G.P.O.,

McCall Pub. Co.,

Dept. of Health, Education, and Welfare, Health Care Financing Administration, Office of Research, Demonstrations, and Statistics],

The Clearinghouse,

U.S. Dept. of Commerce, Bureau of the Census : For sale by the Supt. of Docs., U.S. G.P.O.,