000 00299nam a2200121Ia 4500
100 _aMason, Robin
020 _a0-7494-1149-x
942 _cBK
245 _aUsing communications media in open and flexible learning
260 _aRoutledgeFalmer, London
_c1994
082 _a371.33 Mas
300 _a139
999 _c48074
_d48074