Anyone with the kind of knowledge you're looking for is working as a historical researcher, not a doctor.

In recent decades historical comparative researchers have debated the proper role of general theory.

He is among the top historical researchers and writers in the country.

The university's history department, for example, went after Professor Parker, one of the world's leading historical researchers.

Equally importantly, its many appendices are of great interest and benefit to the historical researcher.

Source materials used by the historical researcher are normally of two kinds, primary and secondary.

He then worked as a historical researcher for the Government of Alberta in the early 1980s.

The historical researcher will find their bibliographies of great interest.

Suddenly, Jack, the detached historical researcher, must confront the truth of his own identity.

He developed a reputation as a foremost literary historical researchers.