@book{21020,
	author = {Hajos, G. ; ed. and Neukomm, G. ; jt. ed.},
	title = {Hungarian problem books I, II & III; based on the Eotvos competitions},
	publisher = {Mathematical Association of America},
	year = {1963; 2001},
	series = {New Mathematical Library ; 11-13},
	address = {Washington, D.C.}
}