na INLIS000000000009960 20130515215640 ind 0010-051300000009960 ind 621.381 5 621.381 5 Fransis, D. Yuri Calon Delta dan Orari ( Organisasi Radio Amatir Republik Indonesia ) / editor, Yubowomono, Cetakan : 2 Solo CV Aneka 1994 60 hlm. : ilus. ;21 cm. 57 Radio