TY  - BOOK
ED  - Indian Standards Institution                                                                                                                                                                                                                                   . 
TI  - Recommendations for symbolic designation of direction of closing and faces of doors, windows and shutters, IS 4043-1969 / 
U1  - 690.028 
PY  - 1982///
CY  - New Delhi : 
PB  - Indian Standards Institution , 
ER  -