00577nam a2200181Ia 4500003000900000008004100009040001600050080002400066110003300090245011000123260005000233300000900283500001900292650001800311650002100329650002400350650002100374IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a083.7:69.028.1bISI  aIndian Standards Institution 0aIndian standard specification for timber door, window and ventilator framescIndian Standards Institution  aNew DelhibIndian Standards Institutionc1973  a16p.  aIS 4021 : 1967  a Standards   a Timber Doors   a Ventilator Frames  aNASA Thesaurus