▁top ▁leadership ▁of ▁that ▁organization ▁for ▁the ▁rest ▁of ▁his ▁life . ▁ ▁Death ▁ ▁A bern , ▁who ▁adopted ▁the ▁party ▁name ▁Harry ▁Allen , ▁was ▁a ▁central ▁leader ▁of ▁the ▁Work ers ▁Party ▁and ▁frequent ▁contrib itor ▁to ▁its ▁paper , ▁Labor ▁Action , ▁until ▁his ▁death ▁from ▁a ▁heart ▁attack ▁in ▁April ▁ 1 9 4 9 . ▁A bern ▁was ▁ 5 0 ▁years ▁old ▁at ▁the ▁time ▁of ▁his ▁death . ▁ ▁Leg acy ▁A bern ' s ▁papers ▁compr ise ▁part ▁of ▁the ▁John ▁D w yer ▁Pap ers ▁held ▁by ▁Wayne ▁State ▁University ▁in ▁Detroit , ▁Michigan . ▁A ▁small ▁collection ▁of ▁his ▁correspond ence ▁with ▁Leon ▁T rot sky ▁is ▁also ▁hous ed ▁at ▁the ▁University ▁of ▁Michigan ▁in ▁Ann ▁Ar bor . ▁ ▁References ▁ ▁External ▁sources ▁▁ ▁Max ▁Sh acht man , ▁" Martin ▁A bern : ▁An ▁Ob itu ary ," ▁Labor ▁Action ▁[ New ▁York ], ▁May ▁ 9 , ▁ 1 9 4 9 . ▁ ▁Wolfgang ▁Lub itz ▁and ▁Pet ra ▁Lub itz , ▁" Martin ▁A bern ," ▁Lub itz ▁T rot sky ana Net . ▁Re vised ▁edition , ▁November ▁ 2 0 0 9 . ▁ ▁F inding ▁A id ▁for ▁the ▁John ▁D w yer ▁Pap ers , ▁Walter ▁P . ▁Re uther ▁Library , ▁Wayne ▁State ▁University . ▁ ▁Category : 1 8 9 8 ▁birth s ▁Category : 1 9 4 9 ▁death s ▁Category : J ew ish ▁American ▁polit icians ▁Category