IntestazioneMachin, John Usata in: Bibliothèque nationale de France, Paris
Machin, John Usata in: Integrated Authority File (GND), Germany
Fonti esterne
Trovato inBN Cat. gén.. — Des mathématiciens de A à Z / Bertrand Hauchecorne, Daniel Suratteau, 2008. — The Laws of the Moon's motion according to gravity / John Machin, 1729