search query: @author Schaefer, W. / total: 5
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3.
Aided recall and recognition in Belson's studies in readership.
Marketing and Research Today
1989 : FEB, VOL. 17:1, p. 41-51
 1989 Schaefer, W.
4.
Readers per copy of trade publications.
European Research
1986 : VOL. 14:4, p. 198-201
 1986 Schaefer, W.
5.
On a code for media research.
European Research
1986 : VOL. 14:2, p. 82-84
 1986 Schaefer, W.
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