00442nam a22001577i 4500001001000000005001700010008004100027082002100068100002100089245005400110250001000164260005100174300001700225650002400242020001800266SXC03071520260819093855.0260101s2009    ii            000 0 eng d  a530.1 ZWI-F2222  aZwiebach, Barton10aFirst course in string theory /cZwiebach, Barton  a2 ed.  abCambridge Univeristy Press, Cambridge,c2009  ap. ;c22 cm. 0aTheoretical physics  a9780511841682