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Subject
- American periodicals--Foreign language press1
- Ammunition1
- Avinoff, Andrey, 1884-19491
- Berl Chemical Corporation1
- Berl, Ernst, 1877-19441
- Berl, Ernst, 1877-194624
- Berl, Herbert4
- Biomass energy1
- Biomass energy4
- Butterworth, J. E.1
- Carbon, Activated1
- Carnegie Museum of Natural History1
- Church, Samuel Harden, 1858-19431
- Civil service positions1
- Civil service--Officials and employees1
- Emigration and immigration1
- Germany1
- Germany. Reichspatentamt2
- Green, J. C.1
- Gruhn, E. W.2