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Knowledge Park Resource

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There is a great deal of confusion about poison ivy versus poison oak since there are two kinds of poison ivy and two kinds of poison oak. Learn more here!
Published by: | Content Team: Historic Preservation Training Center, Training Centers, Roads, Trails and Grounds, Facility Management and Operations, NPS Career Fields, Programs

Knowledge Park Resource

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The Welding Institute has a great reference on wrought iron and welding. Read more on the challenges with welding with wrought iron.
Published by: | Content Team: Buildings, Utilities, and Trades, Facility Management and Operations, NPS Career Fields, Programs, Historic Preservation Training Center, Training Centers