| Reference number | NLB/33/684 |
| Alternative reference number | NLB/33 p406 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison, to E Szczyrba, Szpitalna 5 m15, Warsaw, Russia |
| Date | 20 October 1906 |
| Description | Is unable to find any information regarding the American system teaching children arithmetic. Suggests Szczyrba writes to the Secretary of the American Mathematical Society, 801 West 116th Street, New York City. |
| Extent | 1p |
| Format | Carbon |
| Physical description | Typescript |
| Access status | Open |