A new book highly recommended for every museum educator's and railway preservationist's bookshelf is "Getting Around: Exploring Transportation History" by H. Roger Grant. Also a good introductory text for new employees, new volunteers or interns at your site or museum as well. For more info, see link below.

http://www.krieger-publishing.com/subcats/series/Community_History/GHIforCommunityHistory/G_ListforCommunityHistory/g_listforcommunityhistory_0.html