00420nam a2200157Ia 450000100060000000800410000604100080004708200160005510000160007124500550008726000380014230000110018054600140019165000250020565000320023011769190219s1970 xxu gr 000 0 spa d0 aspa0 a711.4bH2441 aHellman Hal14aThe city in the world of the future /cHellman Hal aNew York :bDellpublishing,c1970 a121 p. aESPAÑOL14aGEOGRAFIA EN GENERAL24aURBANISMO,DESARROLLO URBANO