3 ms·
Sylvia Engdahl's Space Subsite, http://www.sylviaengdahl.com/space.htm http://www.sylviaengdahl.com/space.htm , is a good place to start. She has several essay
by billswift 17y ago
Sylvia Engdahl's Space Subsite, http://www.sylviaengdahl.com/space.htm http://www.sylviaengdahl.com/space.htm , is a good place to start. She has several essays plus links to organizations.