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20th Century Typewriting. By D.D. Lessenberry, T. James Crawford, Lawrence W. Erickson. Second British Edition. Ed. R.M. Harris
David Daniel LESSENBERRY
出版
Sir Isaac Pitman & Sons
, 1971
URL
http://books.google.com.hk/books?id=sEcoMwEACAAJ&hl=&source=gbs_api