The Garza Physics Digest was a periodical published in the 24th century.
Lieutenant Commander Data, while in command of the USS Sutherland, read the article "Tachyon Wave Signatures" from Vol. 120, No. 5 of this digest on a viewscreen while searching for clues on how to detect cloaked Romulan warbirds during the Klingon Civil War in 2368. (TNG: "Redemption II")