000			00343nam a2200133Ia 4500
005			20251222153633.0
008			251222s9999||||xx |||||||||||||| ||spa||
020			_a71413154
082			_a618.2/M12/V.II
245		0	_aObstetricia de Williams
250			_a22a.ed.
264			_bMcGraw-Hill Interamericana Editores, S.A. de C.V.
942			_cLIB
999			_c32451 _d32451