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Le operazioni del compasso geometrico, et militare

Galileo Galilei

出版	Marinelli, 1606
URL	http://books.google.com.hk/books?id=Un0OlAEACAAJ&hl=&source=gbs_api

註釋

Galileo's first work, issued in an edition of only 60 copies. It describes the geometric and military compass, later called the sector, which he devised in about 1597.