@book{59,
	author = {Prager, B. and Richter, F.},
	title = {Beilsteins handbuch der Organischen chemie Supplementary Band (vol-20 to 22)},
	publisher = {Berlin Verlag Von Julius Springer},
	year = {1935},
	series = {20 to 22},
	address = {Berlin}
}