000 00309nam a2200133Ia 4500
008 220601s1961 xx 000 0 eng d
041 _aEnglish
082 _a655
_bPEN
100 _aPenrose
245 0 _aPenrose Annule Vol.55 (1961)
_cPenrose
260 _bLund Pub.
_c1961
650 _aO.M
942 _2ddc
_cBK
999 _c5844
_d5844