TY  - BOOK
ED  - Indian Standards Institution
TI  - Indian standard sizes for squares holes for general enginnering purposes
PY  - 1969///
CY  - New Delhi
PB  - Indian Standards Institution
KW  -  Square Holes-Standards
KW  -  Standards 
KW  - NASA Thesaurus 
N1  - IS 2769 : 1969
ER  -