Chayei HaMusar'/Chajej Hamusor (in Hebrew & Polish; "A Life of Ethics") - published by the students of Beit Yosef of Ostrowiec (Poland) as booklet #15; printed by M. Rozensztajn; 24 pages + cover, 1937 - complete, intact, some age stains on cover + light creases/folds/edge-wear. Produced "with assistance from the Central Torah Fund of London". Includes articles by Rabbis of the Musar movement, R. Yitzchak Blazer, Simcha Zissel of Kelm, Yosef Yozel Horowitz, Israel Yaakov Lubatshansky & Yoel Kleinerman.