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!
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The American Institute of Architects supports the profession through education, advocacy, and public outreach related to new and historic architecture.
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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.
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The Advisory Council on Historic Preservation (ACHP) promotes the preservation, enhancement, and sustainable use of our nation's diverse historic resources.
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The Public Health Program webpage offers reference manuals, factsheets, and suggested training for roles and tasks related to drinking water safety.
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Also provided for other agencies, the USFS Standard Trail Plans provide plans, drawings, and specifications for the construction of Forest Service trails.
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