Ropp, Christian
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- pdbooks.info ID: 117301
Christian Ropp Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
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| Lightning calculator for farmers, merchants and mechanics, short-cut arithmetic and improved ready reckoner three labor-saving works combined | 10th rev., enl. and a greatly improved ed. | 1919 | Author | |  | |  | | |
| Ropp's commercial calculator, short-cut arithmetic and improved ready reckoner, three labor-saving works combined | 10th rev. and greatly improved ed. | 1918 | Author | | | | | | |
| Ropp's price marking tables and profit and loss indicator, showing the selling prices to realize the per cent profit desired and cover all overhead expenses: with other labor-saving tables, rules and short-cuts for the use of buyers, sellers and manufacturers of all kinds of commodities | 1915 | Author | | | | | | ||