Key to pinnock's ciphering-books, in which are given six answers to each sum arranged so as to enable teachers to vary with facility the exercises of their pupils.
| Format | Electronic |
| Publication Info | [S.l.] : John Wiley & Sons, Inc., |
| Supplemental Content | Full text available from Wiley Digital Archives British Association for the Advancement of Science (BAAS) |
| General note | Title from content provider. |
| Access restriction | Available only to authorized users. |
| Technical details | Mode of access: World Wide Web |
| Genre/form | Electronic books. |