, ▁Israel , ▁ed . ▁Encyclopedia ▁of ▁the ▁Hol oca ust . ▁New ▁York : ▁Mac mill an , ▁ 1 9 9 0 . ▁H aff ner , ▁Sebastian . ▁The ▁A iling ▁Empire : ▁Germany ▁from ▁B ism ar ck ▁to ▁Hitler . ▁Pr inc eton : ▁Pr inc eton ▁University ▁Press , ▁ 1 9 8 9 . ▁ ▁Har sch , ▁Don na . ▁German ▁Social ▁Dem ocracy ▁and ▁the ▁R ise ▁of ▁Naz ism . ▁Chap el ▁Hill : ▁University ▁of ▁North ▁Carolina ▁Press , ▁ 1 9 9 3 . ▁ ▁H ent sch el , ▁Klaus . ▁Physics ▁and ▁National ▁Social ism : ▁An ▁Anth ology ▁of ▁Primary ▁S ources . ▁Science ▁Network s ▁Historical ▁Studies , ▁vol . ▁ 1 8 . ▁Bas el : ▁B irk hä user ▁Verlag , ▁ 1 9 9 6 . ▁ ▁Her f , ▁Jeff rey . ▁Re action ary ▁Modern ism : ▁Technology , ▁Culture , ▁and ▁Polit ics ▁in ▁We imar ▁and ▁the ▁Third ▁Reich . ▁Cambridge : ▁Cambridge ▁University ▁Press , ▁ 1 9 8 4 . ▁ ▁H iden , ▁John , ▁and ▁John ▁Far qu har son . ▁Exp la ining ▁Hitler ' s ▁Germany : ▁Histor ians ▁and ▁the ▁Third ▁Reich . ▁Tot owa , ▁N J : ▁Bar nes ▁and ▁No ble , ▁ 1 9 8 3 . ▁ ▁H ilde brand , ▁Klaus . ▁The ▁Third ▁Reich . ▁London ▁& ▁New ▁York : ▁Rout ledge , ▁ 1 9