Description
Item Description:"Reprinted as DHEW publication number (HRA) 77-1601"--Page 2 of cover.
"September 1977"--Page 2 of cover.
"First issued Public Health Service publication series number 1000, October 1972"--Page 2 of cover.
Physical Description:1 online resource (iv, 87 pages) : illustrations.
Bibliography:Includes bibliographical references (pages 28-29).