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'Musigraph 100', slide rule for music theory

1985

Vinyl sheath, a cover for "Musigraph 100", music theory slide rule

1985

Slide rule

1985
Printed instructions for 'Musigraph 100', slide rule for music theory, by Musigraph Company, Teaneck, New Jersey, United States of America, 1985

Instructions for 'Musigraph 100', slide rule, for music theory

1985