The principal topics covered in his speech are outlined below.

In a Communist country where the subject has never before come up, the principal topic of conversation here is income tax.

It wasn't long, however, before Hall's personal life became the principal topic.

The principal topic of William's poetry and short stories for most part is of a Christian religious nature.

Her principal topics of interest are media and the global circulation of images.

Romanticism and its aftermath were the principal topics of this program.

Conversation was a principal topic of the weekend.

A principal topic on the agenda will be removing barriers to trade.

The summit must be for debate and must not concentrate on that sole or principal topic.

The principal topic of the comic is computers, concerning mainly computer games but also including some slightly more technical themes.