Here are entered works on the inland part of Asia, extending from the Caspian Sea in the west to, and including, northwestern China and Mongolia in the east, and from southern Siberia in the north to, and including, northern Iran and Afghanistan in the south, as well as works limited to the republics of former Soviet Central Asia treated collectively.
Here are entered works on the region of North America extending from the Rio Grande in the south to the Mackenzie River Delta in the north and occupying an area extending approximately 400 miles eastward from the Rocky Mountains, including parts of Texas, Oklahoma, New Mexico, Kansas, Nebraska, Colorado, South Dakota, Wyoming, North Dakota, and Montana, as well as parts of Alberta, Saskatchewan, and the Northwest Territories of Canada.
