IntestazionePratt, William Usata in: Integrated Authority File (GND), Germany; British Library: English Short Title Catalogue - AACR2 Heading, London (United Kingdom)
Fonti esterne
Trovato inMP1=Pratt, William, fl. 1616-24; invented, patented and described a new mechanical calculator, 'the arithmetical jewel'; may have been the pupil of Aaron Rathborne, 1572-1618, of Yorkshire; lodged in Salisbury House Gate in the Strand. — Not found in DNB nor AC1 nor AO1
Fonti a stampaPratt, William: The arithmeticall jewell. - 1617
S110540: his The arithmeticall jevvell: or The vse of a small table, 1617 tp=Inuented by William Pratt