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How do I install RoR to match the versions used in the Learning Rails 3 book? (1.9.2 and 3.2.3)

I'm trying to install RoR to match the versions used in the Learning Rails 3 book: ruby 1.9.2 and rails 3.2.3. On advice from stackoverflow I created a gemset as follows:
1. rvm use 1.9.2
2. rvm gemset create rails3.2.3
3. rvm 1.9.2@rails3.2.3
4. gem install rails --version=3.2.3

...this runs, but afterwards when I run "rails -v" I get the complaint "Could not find 'railties'". In other words, the installation is incomplete. Does anyone know a better way of installing these two versions?
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