TY - GEN ED - United Nations Industrial Development Organisation TI - Symposium on maintenance and repair in developing countries : proceedings of.. N1 - 024428 V.29 - Maintenance or renewal by Ullman, A.; 024421 V.30 - Upgrading of maintenance and repair personnel by International Labour Office Geneva; 024433 V.31 - Maintenance in perspective Havelock, A.J.& Jones, P.; 024423 V.33 - Maintenance and repair in small scale industries by Sain Cansharv ER -