A diagram from the 80s of how to do it:
http://io9.com/5945822/a-detailed-plan-for-getting-humans-off-earth
https://makezineblog.files.wordpress.com/2012/09/space-plan-scan-touched...
Might be a good source for old-fashioned terminology among elderly space colonists. "Do you remember when we set up the polar rad hardened habitats? We didn't have fusion or even HEDM in those days. You youngsters don't know how good you have it!"
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