Possible Clues:

• Butter knife, e.g.
• Farm machine
• Study held by agents backing agricultural machine
• Page in small book showing butter knife?
• One frosting a cake, e.g
• Second page reached by customer of paper that covers a wide area
• One broadcasts in Sweden and Portugal with university don
• Device for applying, eg, adhesive
• Page in small book shows butter knife, for example
• Butter knife frequently,