title: Scientific instruments in Russia from the Middle Ages to Peter the Great.
authors.forename: W F
authors.initials: WF
authors.lastname: Ryan
mesh_terms: D004864:Equipment and Supplies / Q000266:history*; D049690:History, Ancient; D049692:History, Early Modern 1451-1600; D049691:History, Medieval; D049711:History, Modern 1601-; D012586:Science / Q000266:history*; D014586:USSR