Clavis usuræ, or, A key to interest, both simple and compound containing practical rules ... whereby, all the various cases of interest ... may very easily be resolv'd both by the pen and a small table of logarithms, hereunto annex'd ... - Ward, John (Printed by J.M. for William Taylor, 1710)
Goldsmiths'-Kress no. 04630. - OCLC, 20883228. - Reproduction of original from Goldsmiths' Library, University of London