000			00361nmm a2200133Ia 4500
008			230125s9999||||xx |||||||||||||||||und||
020			_a9781461306092
100			_aPetio P. Petkov
245		0	_aMathematical Logic
250			_a1990
260			_bSpringer US _c1990
650			_aMathematics and Statistics
856			_uhttps://doi.org/10.1007/978-1-4613-0609-2
999			_c10808 _d10808