//-->
Dairy sales data and other data needed to measure effectiveness of dairy advertising : (including an inventory of available data)
Forker, Olan D., (1987)
Distinguishing between market pariticipation and infrequency of purchase models of butter demand
Blisard, William Noel, (1993)
Dairy products / Summary
(1976)
Margarine in Western Europe
Riepma, Siert F., (1960)