Penreco

Penreco is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Mining Development & Exploration

North American Industry Classification System (NAICS) Categories:

• Support Activities For Nonmetallic Minerals (Except Fuels) Mining > Nonmetallic Mineral Development & Exploration > Mining Development & Exploration

Standard Industry Classification (SIC) Categories:

• Nonmetallic Minerals Services, Except Fuels > Nonmetallic Mineral Development & Exploration > Mining Development & Exploration