2621
2622
Published: 1989.
2623
2624
Published: 2006.
2625
2626
2627
Published: c2007.
2628
Published: 2003.
2629
Published: 1999.
2630
Published: 2000.
Superior document: International library of philosophy
2631
Published: c1998.
Superior document: The world futures general evolution studies ; v. 11
2632
Published: 2003.
2633
Published: 1990.
2634
2635
2636
2637
Published: c2005.
2638
Published: 1997,, c1995.
2639
Published: 1989.
2640