Sara, I'm sorry but I forgot to add the Federal Railroad Administration's web site; www.fra.dot.gov/site/index.htm . This site includes a reserch and development (cutting edge stuff) page and a access to the FRA library including their publications. Van Z. [log in to unmask] _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).