Nepal and Tibet reference book and web-site

Please suggest me a reference book (or any other book to identify these coins) and web-site for Nepal and Tibet coins. I got recently a nice collection of Nepal silver coins 1700-1900 and Tibet copper coins 1913-1951. All these coins are already identified but I want to identify them by myself also. At least Tibet 5 Skar coins are not easy to identify using the information we have here.

1] Rhodes N.G., Gabrisch K., Valdettaro C. : The coinage of Nepal, from the earliest times until 1911.
2] Yin Zheng Min : Zhong guo xi zang qian bi tu lu (Illustrated Catalog of the Money of China's Tibet)
3] Bertsch, Wolfgang : The Currency of Tibet
4] N G Rhodes : The Gaden Tangka of Tibet, Oriental Numismatic Society 1983
5] http://www.snowlandcoins.com/nepali%20coinage.html
6] http://ykleungn.tripod.com/szerupee.htm
7] http://ykleungn.tripod.com/tibcoins.htm
8] http://www.tibetancoins.com/
9] http://www.tibet-encyclopedia.de/tibetische-muenzen.html
10] http://www.tibet-encyclopedia.de/gold-goldmuenzen.html

Thank you Parimal.