This education film from 1957 gives a good overview of using one:

* https://www.youtube.com/watch?v=oYQdKbQ-sgM

"Professor Herning" (?) also has a good series of videos on the use of various scales as well:

* https://www.youtube.com/@ProfessorHerning/videos

His playlist starting at the beginning (C and D scales) with a Manheim layout:

* https://www.youtube.com/playlist?list=PL_qcL_RF-ZyvWJJkJOk_O...

* https://sliderulemuseum.com/Manuals/M37_Post_Manheim_Instruc...

Some manuals / books on slide rules:

* 1909: https://archive.org/details/mannheimsliderul00coxwrich

* 1922: https://archive.org/details/cu31924002978561/mode/2up