Sources: Difference between revisions
From Pumping Station One
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* [http://www.lindsaybks.com/ Lindsay Technical Publications]. An amazing catalog of how to books from the turn of the century to modern technology. | * [http://www.lindsaybks.com/ Lindsay Technical Publications]. An amazing catalog of how to books from the turn of the century to modern technology. | ||
* [http://www.knowledgepublications.com Knowledge Publications]. A lot of energy related books. | * [http://www.knowledgepublications.com Knowledge Publications]. A lot of energy related books. | ||
* [http://www.instructables.com/id/Make-your-own-springs-in-seconds/ Make your own springs]. | |||
