Norman, Robert; Borough, William. (1581). The newe attractiue, containyng a short discourse of the magnes or lodestone, and amongst other his vertues, of a newe discouered secret and subtill propertie, concernyng the declinyng of the needle, touched therewith vnder the plaine of the horizon. Now first founde out by Robert Norman. Herevnto are annexed certaine necessarie rules for the art of nauigation, by the same R. N. London: Ihon Kyngston for Richard Ballard. WorldCat record. OCLC: 181712334.
