Relaxation -- Handbooks, manuals, etc. / https://id.loc.gov/authorities/subjects/sh85112498 https://id.loc.gov/authorities/subjects/sh99001300 : Smith, Jonathan C.
Relaxation -- Study and teaching. / https://id.loc.gov/authorities/subjects/sh85112498 https://id.loc.gov/authorities/subjects/sh2001008697 : Bernstein, Douglas A.