One consists of those that don't rely principally on their track records to bring in business, but instead have a large sales force selling to the public.

Most writers had relied principally on newspaper reports and, indeed, the work of earlier authors.

He relied principally on one diary of an expedition member and an oral history of a survivor.

From the start he was a methodical player who relied principally on solid ground strokes and superb fitness.

However, his virtuosity was never restored to the original level, and his playing after his stroke relied principally on his right hand.