Found occurrences of H. G. Armstrong in 2 documents in the collection. Click on a column heading to sort by it, or to toggle ascending or descending sorting for the current column:

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Rebellion Record: a Diary of American Events: Documents and Narratives, Volume 4. (ed. Frank Moore) 14 4 Browse all entities in this document
Knight's Mechanical Encyclopedia (ed. Knight) 4 0 Browse all entities in this document