His primary work has been "historical dictionaries" on various subjects.

At present there are roughly 400 historical dictionaries in print.

The article soon ballooned in his mind into a historical dictionary of American slang.

Historical dictionaries of literature and the arts, no. 2.

By contrast, the bibliography for my historical nautical dictionary already numbers close to 285 works.

The Historical Dictionary of Iran puts the number at 1 million.

That is part of the fascination in reading around in this Historical Dictionary.

It is stated to be "the first historical dictionary devoted to science fiction", tracing how science-fiction terms have developed over time.

An American biographical and historical dictionary, 2nd ed.

His most recent book is "The Historical Dictionary of Iraq."