00382nam a22001217a 4500003000800000005001700008008004100025040002100066082001500087245009200102260004000194300002600234BD-DhUL20170413104806.0170413b        xxu||||| |||| 00| 0 eng d  cBD-DhULdBD-DhUL  a338.8bUNP  aProceeding of the seminar on geochemical prospecting methods and techniques :bno. 21 /  aUnited Nations :bNew York ,c1963.  a302p. :bill.,c28cm.