TY  - RPRT
TI  - Marketing techniques in print.
AU  - R T Smithing
AU  - M D Wiley
DO  - 10.1111/j.1745-7599.1989.tb00752.x
UR  - https://pubmed.ncbi.nlm.nih.gov/2631932/
ID  - 2631932
ER  -