Lawrence Music Transposer
Click on the next links to see professional panoramic pictures of the Music Transposer Rule:
Click on the next links to see professional panoramic pictures of the Music Transposer Rule:
Rance, David G: Slide Rules are (Still) Music To My Ears: https://sliderules.nl/media/papers/Slide_Rules_Are_%28Still%29_Music_To_My_Ears_-_IM2006.pdf