Underground railroad quilts- Research for a speech

[eenie114]

I'm in a public speaking class, and I'm giving an informative speech on underground railroad quilts. Do any of you know where I can find information on these? These are the books I've found so far:
http://www.amazon.com/Hidden-Plain-View-Underground-Railroad/dp/0385497679/ref=pd_sim_b_1#_Hidden in plain sight

http://www.amazon.com/gp/product/15..._m=ATVPDKIKX0DER&pf_rd_r=0MA52HQ5KADSH33F1W8Z ]Facts and Fabrications

http://www.amazon.com/Civil-War-Diary-Quilt-Inspired/dp/0873499956/ref=pd_sim_b_5The Civil War diary quilts

I'm not supposed to use Wikipedia as a resource, since anybody can edit it. Resources other than the Internet would be best, but I'll take whatever you come up with. Minimum number of resources is 3, max. 5.
Thank you!

 

[country lady]

Check your library for Barbara Brackman, quilt historian. You might also goggle quilt historians--there are quite a few out there. Good luck on your speech.