الآن تُعرض المواد 1 -- 14 من 14

      أسماء المؤلفون
      UDAS, G.R. [1]
      UNESCO [2]
      UNESCO&S.R.F. [2]
      UNESCO/UNDP/SF [1]
      UNICEF [3]
      UNIDO [1]
      UNITED NATIONS COUNTRY TEAM [1]
      UNIVERSITY OF PETRL.&MINE.RES. [2]
      UNKNOWN [6]
      UNKTAD [1]
      USAID [1]
      USGS [1]
      USGS&SCGS [1]
      USSR [1]