Kettunen, Markku Gammajetfixedwing gamma survey for the detection of radioactive materials. - Helsinki : STUK, 2002. - 38 p. : il., tabla, diagr. "Finnish support to IAEA" BibliografĂa y apĂ©ndices: p.15-38 ISBN: 951712564X ISSN: 07859325 Standard No.: STUK-YTO-TR-185