000 00286nam a2200121Ia 4500
008 221001s1970 xx 000 0 eng d
082 _a517.6 PRO
100 _aProtter, Morrey
245 0 _aModern mathematics
260 _aMan.
_bAdditr Wemly
_c1970
300 _a790p.
942 _2ddc
_cBK
999 _c6724
_d6724