“A Didactic Introduction to Arithmetic, Sir Charles Cotterell’s ‘Instrument for Arithmeticke’ of 1667”
Bryden, D. J. (1973). A Didactic Introduction to Arithmetic, Sir Charles Cotterell’s ‘Instrument for Arithmeticke’ of 1667. History of Education, 2(1), 5–18. https://doi.org/10.1080/0046760730020101