The letter does not refer to whether the city should do business with the company.

His eyes opened in surprise when he noted that the letter referred to the same matter.

The next letter refers to a proposed lobby of quite a different sort.

His aides said the letter referred to the calendar year.

These letters refer to what graphics option the system has.

The letter also refers to the criticism over the original British version.

The letter, however, did not refer to a witch hunt.

Paul's letters do not refer directly to this experience on the Damascus road.

Enclosed with these notes you will find a letter referring to Fees for 1986.

Often it was not clear how the letters refer to the neumes.