СПРАВОЧНИК ПО РАСЧЕТАМ НА МИКРОКАЛЬКУЛЯТОРАХ

[Karl-Ludwig Butte]

Thanks a lot for sharing this link, SlideRule. Translating the first paragraph of page 7 answers the question, if this book is written for MK-series calculators:

"The reference book includes an extensive library of programs (over 250 of them) for mass domestic programmable micro-calculators with inverse infinitely infinite calculation logic Electronics BZ-34. They are suitable for their functional analogs Electronics MK-54 and Electronics MK-56, as well as (after a simple translation) for micro calculators HP-UC, NRLЪS, HP-21S, HP-67, etc. firm Hewlett Packard (USA). Over 50 programs for one of the most complex programmable microcalculators with algebraic logic TI-58C and TI-59 by Texas Instruments (USA) are also described. Acquaintance with them will allow readers to understand a lot of programs described in foreign literature and get skills in translation of programs."
(Translation by deepl.com)

Besides the BZ-34, the BZ-19M and the BZ-38 are mentioned.

Unfortunately the links posted by Leonid seem to broken - I receive a 404 error.

Best regards

Karl