From 2015 the periodicity is six-monthly and each notebook costs € 26.00
They must be made by bank transfer or postal order on:
Bank checks are not accepted.
The subscription contract is valid for one year and shall be deemed to have ended upon dispatch of the last issue of the year. In order to ensure the continuity of mailings, the subscription must be renewed by 31 January of the year at the latest, subject to payment of the fee. For each payment please always specify the eight-digit code that we assign to uniquely identify the subscription contract, in addition to the details of the subscriber, with full address of zip code. The numbers back can be purchased as individual books, consulting the respective web pages.