000 00293nam a2200097Ia 4500
008 150310s9999 xx 000 0 und d
100 _aSTEPHENSON G
245 _aAN INTRODUCTION TO PARTIAL DIFFERENTIAL EQUATIONS FOR SCIENCE STUDENTS
250 _a2
260 _c1970
_bENGLISH LANGUAGE BOOK SOCIETY
999 _c8652
_d8652