Radiation safety training criteria for industrial radiography. - Washington : NCRP, 1978. - v, 32 p. - Report, no.<61> . - Estados Unidos. National council on radiation protection and measurements . - Report, no.<61> . Recommendations of the NCRP ApĂ©ndices y bibliografĂa: p.15-19 ISBN: 0913392456 ISSN: 0083209X Standard No.: NCRP-REPORT-61 Subjects--Topical Terms: RADIACIONES PROTECCIONRADIOGRAFIA INDUSTRIAL