00299nam a22000977a 4500008004100000082001500041110003000056245008900086260001700175300000900192230620b        xxu||||| |||| 00| 0 eng d  a309.2bNRC  bNational research Council  aUS Science and Technology for DevelopmentbA contribution to the 1979 U.N Conference  aViennac1979  a212p