The Watch Tower Bible and Tract Society of PA is one of the legal corporations in use by Jehovah's Witnesses to publish Bibles, Bible-based literature, and other materials - including video and audio works - for Jehovah's Witnesses to use in their worship. The Watch Tower Bible and Tract Society of PA is a non-profit organization and all their works, including this one, are available freely. Their work is supported entirely by voluntary donations. jw.org
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