@book{2709,
	author = {Bernal, John Desmond},
	title = {Science in history (vol-4)},
	publisher = {C.A.Watts and Company Limited Pelican Books},
	year = {1969},
	series = {4},
	address = {England},
	edition = {3rd},
	note = {025A / 15.11.1969}
}