資源委員會函李平寇特公司欲購買Chromium Plating及Mechanized Accounting:being a review of the latest methods of Mechanical book-keeping together with a survey of machines used二書，國外貿易事務所夠料室{#袁桓猷#}函李平寇特公司{#Edward Schaefer#}欲購買{#Elizabeth F.Von Hasse#}著So To Speak一書