Ming Kan no Syuzan Syo [a]: [Chinese Abacus Books Published in the Ming Age] By Akihito Kodama. Part 1: On the Chinese abacus books published in the Ming age (in Japanese), 115 p. Part 2: Chinese abacus books published in the last half of the 16th century of the Ming age (in Chinese), photocopy, 127 p. Tokyo (Fuji Junior College Press). 1972 242 p. ¥1500