Such a book must be a unified and substantial work.

By 1815, he had introduced his son, Thomas, into the family business and they produced some substantial work together.

Each brought substantial work to the practice and the firm became very successful.

During this review, we look to se whether you are doing substantial work.

He failed to write another substantial work, and died in 1984.

Officials said they did not have money to do substantial work on the northern end.

This is substantial work that Parliament has reason to support.

Very substantial work has been done in this House by everyone concerned.

This painting was to be his largest and most substantial work.

It took awhile for her to get substantial work after being on the show.