At 21:20 10 December 2010, andrei296 wrote:

Looking for some books for some time but in my country are very hard to
find, even impossible.

Jane's World Sailplanes and Motor Gliders - Coates, Andrew (1978).
Gliders and Sailplanes of the World. Shepperton - Hardy, Michael
(1982).
Jane's Encyclopedia of Aviation - Taylor, Michael J. H. (1989).
Airlife's General Aviation - Simpson, R. W. (1995).

A useful source of used books is abebooks.com
There I find 23 copies of your first book, priced from 6.11 $US
Several copies of the second, from 16.28. Take a look for
the others. I've bought numerous books (one that was shipped to the US
from Australia) from sellers located through this source.

Jim Beckman