COMPUTER LITERACY FOR TEACHERS
FRANK P.BESAG LEONARD P.LEVINE1984 年出版112 页ISBN:
LEONARD KAREL AND ELIZABETH SPENCER ROACH1951 年出版373 页ISBN:
HOWARD O.TRIEBOLD LEONARD W.AURAND2222 年出版497 页ISBN:
STRUCTURED COBOL SECOND EDITION
A.S.PHILIPPAKIS LEONARD J.KAZMIER1981 年出版477 页ISBN:0070498016