INTRODUCTORY ECONOMIC GEOGRAPHY SECOND EDITION
LESTER E. KLIMM AND OTIS P. STARKEY1940 年出版501 页ISBN:
INTERACTIVE COMPUTING SERIES INTRODUCTORY EDITION
KENNETH C.LAUDON KENNETH ROSENBLATT DAVID LANGLEY2222 年出版40 页ISBN:0072471840
INTRODUCTORY CIRCUIT ANALYSIS 9TH EDITION
ROBERT L.BOYLESTAD2002 年出版1200 页ISBN:7040114186