Diamond Shamrock

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

• Convenience Stores
• Oil Refineries

North American Industry Classification System (NAICS) Categories:

• Petroleum Refineries > Oil Refining
• Convenience Stores

Standard Industry Classification (SIC) Categories:

• Petroleum Refining > Oil Refining
• Grocery Stores > Convenience Stores