FFIRST CERTIFICATE IN ENGLISH PRACTICE TESTS 2
CAMBRIDGE UNIVERSITY PRESS1965 年出版92 页ISBN:
MENC HANDBOOK OF RESEARCH METHODOLOGIES
RICHARD COLWELL2006 年出版404 页ISBN:9780195304558
RECOMBINANT DNA RESEARCH AND VIRUSES
YECHIEL BECKER1985 年出版373 页ISBN:0898386837