In the rare early material, you take what you can get.

Known since Roman times, silk remained a rare and expensive material.

Most libraries have guards in reading rooms where rare materials can be used.

Information about auditing the more rare materials at the Library itself can be found here.

Even so, the rare and new material on "Crossroads" is worth hearing.

"We wanted to make sure our most rare and fragile materials are handled with a lot of care," she said.

Resources found in the game include: energy, metal, rare materials, and oil.

Stone was a rare material in the late 18th century Kolkata.

They will not require large facilities or rare raw materials.

The two factions are in a never-ending war for a rare material called dark matter.