Although some earlier unpublished studies had been prepared, not until the early 1970s was true textual criticism applied to the Book of Mormon. At that time BYU Professor Ellis Rasmussen and his associates were asked by the LDS Church to begin preparation for a new edition of the church's scriptures. One aspect of that effort entailed digitizing the text and preparing appropriate footnotes, another aspect required establishing the most dependable text. To that latter end, Stanley R. Larson (a Rasmussen graduate student) set about applying modern text critical standards to the manuscripts and early editions of the Book of Mormon as his thesis project—which he completed in 1974. Larson carefully examined the original manuscript (the one dictated by Joseph Smith to his scribes) and the printer's manuscript (the copy Oliver Cowdery prepared for the printer in 1829–1830), and compared them with the first, second, and third editions of the Book of Mormon; this was done to determine what sort of changes had occurred over time and to make judgments as to which readings were the most original. Larson proceeded to publish a set of well-argued articles on the phenomena which he had discovered. Many of his observations were included as improvements in the 1981 LDS edition of the Book of Mormon.