000 00591nam a2200229 a 4500
005 20210219153157.0
008 991125n 000 0 u
035 _aUPN01000082140
100 _aDitteon, Richard
222 _aPHYSICS TEACHER
245 _aIn my opinion. A new sign conversion for geometrical optics
300 _a38-40
362 _a31, No. 1, 1993
505 _aSeptiembre 1993
653 0 _aFISICA
653 0 _aINSTRUCCION CIENTIFICA
653 0 _aLUZ
653 0 _aOPTICA
653 0 _aSIMBOLOS (MATEMATICAS)
904 _aAC
_b019951
905 _aArticulo
999 _c70271
_d70271