Langen, Dietrich M.D.
Speaking of sleeping problems : learning to sleep well again, including directions for making an analysis of your sleep and keeping a sleep diary / Dietrich Langen, M. D. - New Delhi : A Sterling Paperback , 1994. - 127 p.
Sleep disorders
Sleep
616.849 L275S 1994
Speaking of sleeping problems : learning to sleep well again, including directions for making an analysis of your sleep and keeping a sleep diary / Dietrich Langen, M. D. - New Delhi : A Sterling Paperback , 1994. - 127 p.
Sleep disorders
Sleep
616.849 L275S 1994