The <a href="http://loc.gov">Library of Congress</a>, <a href="http://loc.gov/ammem">American Memory Collection</a>, offers a a resource titled "<a href="http://memory.loc.gov/ammem/amrvhtml/conshome.html">Evolution of the Conservation Movement</a>," a collection of published works, manuscripts, images, and motion picture footage. The goal of the collection is to teach about the formation of the movement to conserve and protect America's natural heritage.