Kimie san Markarian intruis sorobanon dum Bitburga 10a Novjara Renkontigho ek de la 27an Decembro ghis la 3an Januaro 2012
Soroban Tutorial
Soroban Education in Japanese Community
KCP International - Japanese Language School
Association francaise de soroban, autres abaques et calcul mental.
e.e.
