@book{53,
	author = {Prager, B. and Richter, F.},
	title = {Beilsteins handbuch der Organischen chemie Supplementary Band (vol-07 to 08)},
	publisher = {Berlin Verlag Von Julius Springer},
	year = {1931},
	series = {7 to 8},
	address = {Berlin}
}