▁L w ów ▁Gh etto . ▁Post cards ▁written ▁under ▁false ▁names ▁from ▁the ▁gh etto ▁to ▁their ▁son ▁Joseph ▁also ▁under ▁a ▁false ▁name ▁as ▁he ▁was ▁in ▁hiding ▁in ▁Nice , ▁may ▁show ▁that ▁they ▁surv ived ▁the ▁L viv ▁pog rom s ▁of ▁ 1 9 4 1 . ▁But ▁the ▁end ▁of ▁any ▁communication ▁in ▁ 1 9 4 2 ▁may ▁show ▁that ▁they ▁had ▁been ▁sent ▁to ▁concentration ▁cam ps , ▁maybe ▁after ▁the ▁" Gre at ▁A ktion " ▁( G ro ß akt ion ) ▁of ▁August ▁ 1 9 4 2 ▁when ▁between ▁ 4 0 , 0 0 0 ▁and ▁ 5 0 , 0 0 0 ▁Jews ▁were ▁deport ed ▁from ▁the ▁L emberg ▁Gh etto ▁to ▁Bel zec . ▁Be er ▁always ▁thought ▁his ▁parents ▁had ▁been ▁murder ed ▁in ▁Aus ch witz ▁and ▁his ▁younger ▁sister ▁Su z anne ▁in ▁Buch en wald . ▁His ▁libre tt ist ▁Fritz ▁Lö hner - B eda ▁was ▁murder ed ▁in ▁Mon ow itz ▁( A usch witz ▁III ) ▁on ▁ 4 ▁December ▁ 1 9 4 2 . ▁ ▁Following ▁the ▁events ▁of ▁the ▁war , ▁Be er ▁became ▁increasing ly ▁with dra wn ▁and ▁refused ▁performance ▁rights ▁to ▁his ▁previous ▁works . ▁Still , ▁ ▁was ▁performed ▁in ▁Sc and in avia ▁without ▁his ▁co - operation ▁or ▁consent ▁— even ▁post hum ously ▁up ▁until ▁ 2 0 0 5 — ▁often ▁under ▁the ▁title ▁Mas urk ka . ▁In