The name of Tipson is associated with this new romanization which still embodied the phonology of the Fenyun to some extent. It is the system used in Meyer-Wempe and Cowles' dictionaries and O'Melia's textbook and many other works in the first half of the twentieth century. It was the standard romanization until the Yale system supplanted it. The distinguished linguist Y. R. Chao developed a Cantonese adaptation of his Gwoyeu Romatzyh system. The Barnett-Chao romanization system was first used in Chao's "Cantonese Primer", published in 1947 by Harvard University Press (The "Cantonese Primer" was adapted for Mandarin teaching and published by Harvard University Press in 1948 as "Mandarin Primer"). The BC system was also used in textbooks published by the Hong Kong government.