00358nam a2200109Ia 450000500170000000800410001705000160005810000210007424500890009526000260018465000380021020251229125143.0251229s9999    xx            000 0 und d  aP 91.3 .A53  aAnderson James A 0aMedia research methodsbunderstanding metric and interpretive approachescA Anderson  aLondonb SAGEc. 2012  aMass Media- Research- Methodology