@book{552943,
	author = {Frankel, Abraham A.},
	title = {Mengenlehre und logik /},
	publisher = {Duncker & Humblot,},
	year = {1959.},
	series = {Erfahrung und Denken ;},
	address = {Berlin :},
	note = {ფოტოპირი.}
}