The William Snow book is available on microfiche from the University Microfilms Inc., (UMI) of Ann Arbor Michigan. It is catalog OCLO no. 16261857. There is a minimum order and I think the cost of each microfilm is about $8 or 10 dollars. They have a web site and their snail mail address is UMI, 300 N. Zeeb Rd, PO Box 1346, Ann Arbor MI 48106-1346 Phone 1-800-521-0600. Kathleen