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1991-95 HKCEE Qusetion Papers : Typing & Shorthand
1st ed.. HKEAA, 1995 書
1992-96 HKCEE Qusetion Papers : Typewriting & Sharthand
1st ed.. HKEAA, 1996 書
1992-96 HKCEE Qusetion Papers : Typing & Shorthand
1993-1997 HKCEE Qusetion Papers : Typing & Shorthand
1st ed.. HKEAA, 1997 書
All About Codes
written by Gail Blasser Riley 1st ed.. Steck-Vaughn, 2000 書
Secret Codes
by Ken Beatty 1st ed.. Person, 2007 書
Breaking the Code with Cryptography : Analyzing Patterns
Janey Levy 1st ed.. Rosen, 2006 書
The Secret Life of Codes : It’s Maths with the Laughs Added in!
Kjartan Poskitt ; ill. by Philip Reeve 1st ed.. Scholastic, 2010 書
