"Czech and Slovak Telephone Tokens" by Roman Grzegorczyn, a new catalogue with great color images, 60 pp. Available from the author, US$26 + $6 shipping by registered post (up to five copies for single shipping charge). Contact and PayPal at romangr1@poczta.onet.pl
I have known this diligent researcher for many years. He resides in Wielun, Poland.