000 00306nam a2200121Ia 4500
008 170418s9999||||xx |||||||||||||| ||und||
082 _a UNI/U J0
245 _aUniversity of Pennsylvania Bulletin;
250 _aIst
260 _aUniversity;
_bPhiladelphia;
_c1950
300 _a24p.
650 _aEnglish;
999 _c440115
_d440115