000 002980000a22001210004500
008 140223b1977 xxu||||| |||| 00| 0 eng d
041 _aEnglish
100 _a:UNESCO NATURE&RESOURCES
245 _aNATURE AND RESOURCES VOL13
260 _aPARIS
_bUNESCO
_c1977
650 _a
_a
906 _a:UNESCO
999 _c139858
_d139858