R' Rosenfeld - Sichos HaRan by Sichah/ שיחות הר"ן
SICHAH 110 – The Benefits of Sleep
Podcast (shiurim): Download (Duration: 3:19 — 4.6MB)
Sichos HaRan 110 – The Benefits of Sleep – Speaker: Rabbi Zvi Aryeh Rosenfeld zal. (Lesson rw25bclip-1. Recorded in 1977.)
The entire shiur is HERE.