TY  - BOOK
TI  - Medical subject headings: main  headings, subheadings and cross references used in the index medicus and the National Library of medicine catalog                               
U1  - 025.3361 
PY  - 1960///
CY  - Washington 
PB  - Department of Health Education and Welfare
KW  - Library and Information Sciences
KW  - Subject headings--Medicine
ER  -