He made his doctoral studies in the field of national defense.

However, it was not until 1969 that he could complete his doctoral studies.

The research and implementation was done during his doctoral studies.

He returned to Columbia for two years of doctoral study in history.

Presently he is at the end of his doctoral studies in business research.

He pursued doctoral studies from 1974 to 1975, but did not complete them.

I'd come upon his writings during my doctoral studies in London.

Every year, about top 60% students are recommended for their master's and doctoral study.

After completing the first degree students can move on to doctoral studies.

In the 1980s, a system of scholarship was established to support doctoral studies.