TY - GEN ED - United Nations Industrial Development Organisation TI - Symposium on maintenance and repair in developing countries : proceedings of.. N1 - 024444 V.15&16 - Chemical cleaning of process planting by Newton, M.B. & Entretein preventif entretienet reparation des appareils de rayons by Mulleris H.; 024443 V.17 - Consideration of problems in design of installations mainentainence and repair in developin countries by Holub, Jan ER -