Leffingwell, William Henry, 1876–1934
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL2248698A
- pdbooks.info ID: 39479
William Henry Leffingwell Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
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| The automatic letterwriter and dictation system | 1918 | Editor | |  | | | | 
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| Data on advertising department records | 1917 | Author | | | |  | |   
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| Making the office pay: tested office plans, methods, and systems that make for better results from everyday routine | 1918 | Editor | | | | | |
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| The office appliance manual | 1926 | Author | | | | | | ||
| Office management: principles and practice | 1925 | Author | | | | | | ||
| Scientific office management | 1917 | Author | | | | | |
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