00461nam a2200121Ia 4500008004100000040001700041082002000058110001900078245014600097260003500243300001500278650004600293190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta549bU58I  aUnited Nations 0aInterregional seminar on the development of the mineral resources of the continental shelfbPort-of-Spain, Trnidad and Tobago 5-16 April 1971  aNew YorkbUnited Nationsc1972  aiii, 172p.  aMines and mineral resources; Hydrocarbons