1. Spengler O. The Decline of the West, Oxford, New York, one volume edition, republished 1991. Spengler published the 1st volume of his Der Untergang des Abendlandes in 1918 and the 2nd in 1922.
2. Carbon dioxide emissions in a methane economy;Ausubel;Climatic Change,1988
3. Does climate still matter?;Ausubel;Nature,1991
4. The liberation of the environment;Ausubel;Daedalus,1996
5. Lightening the tread of population on the land: American examples;Waggoner;Population and Development Review,1996