IS:1034-1957 Specification for loud speaker system for community radio reciever
Indian Standard Institution Manak Bhawan
IS:1034-1957 Specification for loud speaker system for community radio reciever - ISI Manak bhawan 1957 - 4
IS:1034-1957 Specification for loud speaker system for community radio reciever - ISI Manak bhawan 1957 - 4