LAU Chung Him books & textbook
Principles and Practice of the Chinese Abacus
Lau Chung Him & Co. /1970-01-01 Paperback
The principles and practice of the Chinese abacus
Lau Chung Him & Co /1964T Paperback
Names of commodities and other appellatives in Chinese and English (with addenda)
Lau Chung Him and Yao Yuan Lun
Lau Chung Him and Co. /1984T Paperback
