Search Results       Your search for [subject]Duffield, David Walter, 1882- returned 1 record.           Progressive filing. by Kahn, Gilbert; New York: Gregg Pub. Div., McGraw-Hill, 1961. Subject: Duffield, David Walter, 1882-; Files and filing (Documents); Indexing; Progressive indexing and filing for schools.          Add to Book Cart Relevance: 28.66%