00421nam a2200133Ia 4500008004100000010001200041040001700053082002200070100002000092245008600112260003000198300001400228650004500242190328s9999||||xx |||||||||||||| ||und||  a60-8703  aNITILcNITIL  221sta309.2bE85T  aEttinger, J Van 0aTowards a habitable worldbtask-problems and methods-accelerationcJ Van Ettinger  aAmsterdambElsevierc1960  axi, 318p.  aHuman settlements; Population; Sociology