TY - BOOK A1 - Jacobson, E. T1 - You must Relax. A Practical Method of Reducing the Strains of Modern Living, New York and London (Whittlesey House – McGraw-Hill Book Company) 1934. Y1 - 1934 N1 - Dedicated by Bahary Family 2004 ER - TY - BOOK A1 - Jacobson, E. T1 - Progressive relaxation, Chicago (The University of Chicago Press) 1959. Y1 - 1959 ER -