<https://byo.com/product/brown-porter/#product>
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"Written by Jamil Zainasheff, for those that seek more than just recipes, but also an explanation of key ingrediets and techniques. This is the perfect read for those trying to perfect their Brown Porter homebrew recipe.\r\n\r\nDownload this pdf for reading or reference on your computer or portable device."
<https://byo.com/product/brown-porter/>