The art of arithmeticke in whole numbers and fractions in a more readie and easie method then hitherto hath bene published - Ramus, Petrus 1515-1572 (By Richard Field for Robert Dextar dwelling in Paules Church yard at the signe of the brasen serpent, 1592)
Reproduction of original in: British Library. - STC (2nd ed.), 15241.3. - Signatures: A-E8, F4, G2