@book{30986,
	author = {Herschel, John Frederick William.},
	title = {Wstep do badan przyrodniczych /},
	publisher = {Panstwowe Wydawnictwo Naukowe,},
	year = {1955.},
	series = {Biblioteka Klasykow Filozofii},
	address = {[Warszawa] :}
}