00542cam a2200157u 4500 830613s1967 enka 100 0 eng 9221124754 Walle Manfred. 6624 Safety and health in small-scale surface mines; A handbook .Sectoral activities programme working paper (WP.168) Manfred Walle and Norman Jennings Geneva, ILO Publication 2001 v, 51p. illus. Mining Safety 6625 Jenning Norman. 6626 BK TN295 .I62 1963 29619 29619 0 0 lcc 0 0 NFIC MAIN MAIN OOER 2014-06-02 GFT 0 TN 295 .W15 2001 0016138 2014-06-02 00:00:00 1 2014-06-02 BK