Companion for the Chemist to the Chemiker-Kalender for 1931. Volume 1. The Most Important Auxiliary Tables for Laboratories (Sputnik khimika po Chemiker-Kalender na 1931 god), 1931. In Russian.

Спутник химика по Chemiker-Kalender на 1931 год.
Том 1. Важнейшие вспомогательные таблицы для лабораторий.
2-е издание.
Ленинград: НХТИ (Научно-химико-техническое издательство, ОНТИ), 1931.
76 с. Твердый тканевый переплет. Уменьшенный формат. Тираж: 10 000 экз.
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Companion for the Chemist to the Chemiker-Kalender for 1931. Volume 1. The Most Important Auxiliary Tables for Laboratories (Sputnik khimika po Chemiker-Kalender na 1931 god).
Second edition.
Leningrad: NHTI (Nauchno-Khimiko-Tekhnicheskoe Izdatel'stvo, ONTI), 1931.
76 p. Hard cloth binding. Reduced format. Edition of 10,000 copies.

This book is a translated and adapted Soviet edition of the renowned German reference handbook "Chemiker-Kalender" (Chemist's Calendar), which served as an essential annual compendium of data for chemists, physicists, and laboratory technicians. Published by the Scientific Chemical-Technical Publishing House (NHTI/ONTI) in Leningrad, this second edition provided Soviet scientists and engineers with crucial auxiliary tables, including atomic and molecular weights, logarithmic multiples, conversion factors for analyses, density tables, and various physical constants. As a compact, hardbound volume in a reduced format, it was designed for daily practical use at the laboratory bench. The publication reflects the intensive transfer of scientific and technical knowledge into the USSR during its period of rapid industrialization, making a specialized German reference accessible to a wider Russian-speaking audience.