[SpaceProgram] PDF - NASA Interstellar Propulsion Research: Realistic Possibilities and Idealistic Dreams

[Jerry Isdale]

Interstellar Propulsion Research: Realistic Possibilities and Idealistic Dreams 
by Les Johnson, NASA Marshall Space Flight Center.

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20090020444_2009016488.pdf

ahh more to read.  This link comes from the 100YSS org's Fbook page
They have been posting a lot recently

Jerry Isdale
isdale at gmail.com