Disease Surveillance Branch
Epidemiology Division
USAF School of Aerospace Medicine
Aerospace Medical Division (AFSC)
Brooks Air Force Base, Texas 78235
For sale by the Superintendent of Documents. U.S. Government Printing
Office
Washington, DC. 20402
Stock No. 008-070-00397-0/Catalog No. D 301,35: 161/43
U.S. GOVERNMENT PRINTING OFFICE: 1977 O—251-048