000 00358nam a2200097Ia 4500
008 120223s9999 xx 000 0 und d
082 _a371.3 MER
100 _aMerrill, M. David
245 _aInstructional design : readingas
260 _bCliff,N.J. Prentice-Hall
_aEnglewood
_c1971
999 _c149608
_d149608