TF 65/2 duplex slide rule
Subtitle: for figuring the lengths, diameters, tensions and inharmonicity coefficients of all strings for pianos, harpsichords, etc.
By: by Lothar Thomma and Klaus Fenner ...
Contributors: Fenner, Klaus.
Edition: 2., verb. und erw. Aufl.
Series: Das Musikinstrument, Lehr- und Arbeitsmaterial
Publisher: Verlag das Musikinstrument
Published: 1980
Place of publication: Frankfurt am Main
Language: eng
Subjects: Piano -- Construction.; Piano -- Tuning.
Notes: Cover title.

Accompanying booklet includes an introduction, directions for use and examples.