000 00358nam a2200121 4500
245 _aAerial surveys and integrated studies: proceedings
100 _aUnesco
260 _aParis
_bThe Author
_c1968
300 _a575p.:ill.; 28cm.-
490 _aNatural resources research; no. 6
500 _aProceedings of the Toulouse Conference,1964
082 _a526.9823
_bUNE
999 _c4422
_d4422