DGRG meaning in International ?

The Dictionary of Greek and Roman Geography was the last of a series of classical dictionaries edited by the English scholar William Smith (1813–1893), which included as sister works A Dictionary of Greek and Roman Antiquities and the Dictionary of Greek and Roman Biography and Mythology. It was first published in 1854, and last reissued in 2005.

As declared by Smith in the Preface: "The Dictionary of Geography ... is designed mainly to illustrate the Greek and Roman writers, and to enable a diligent student to read them in the most profitable manner".

The book stays up to the description: in two massive volumes the dictionary provides detailed coverage of all the important countries, regions, towns, cities, and geographical features that occur in Greek and Latin literature, without forgetting those mentioned solely in the Bible. It however rightfully states that "Greek and Roman" has been retained, partly for the sake of uniformity, but chiefly to indicate the principle object of the work.'