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Encyclopedia Astronautica the most complete resource for space history - rockets spacecraft launch vehicles astronauts cosmonauts spaceflights engines space exploration
The most complete library of Marxism with content in 80 languages and the works of over 720 authors readily accessible by archive, sujbect, or history as well as hundreds of periodicals.
The Institute for Historical Review is an independent educational center and publisher that works to promote peace, understanding and justice through greater public awareness of the past, and especially socially-politically relevant aspects of modern history.
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