TY  - BOOK
ED  - Indian Standards Institution
TI  - Indian standard specification for timber door, window and ventilator frames
PY  - 1973///
CY  - New Delhi
PB  - Indian Standards Institution
KW  -  Standards 
KW  -  Timber Doors 
KW  -  Ventilator Frames
KW  - NASA Thesaurus 
N1  - IS 4021 : 1967
ER  -