Clever Book Ltd.
Headquarters: Bulgaria, 1528 Sofia, 10 Nedelcho Bontchev Blvd., office 18
Tel: +359 887 206 150
E-mail: office@cleverbook.net
You can see our products in Bulgarian at https://cleverbook.net/
Contacts
Address:
Enquiry for 100 PUZZLES ABOUT THE NATURE AND THE NUMBERS