@book{2018,
	author = {Ditisheim, Paul,},
	title = {Pierre Le Roy et la chronométrie;},
	publisher = {Éditions Tardy},
	year = {[1940]},
	address = {Paris,},
	note = {At head of title: Paul Ditisheim, Roger Lallier, L. Reverchon [et] le commandant Vivielle.}
}