Spravochnoe posobie po izobretatel'stvu, ratsionalizatsii i patentnomu delu
By: B.G. Prakhov, N.M. Zenkin.
Contributors: Zenkin, N. M.
Edition: 2. izd. perer. i dop.
Publisher: Vyshcha shkola
Published: 1980
Place of publication: Kiev
Language: rus
Notes: First ed. published in 1977.