Food aid : the challenge and the opportunity
Hans Singer1987 年出版245 页ISBN：0198285183
THE CHALLENGE OF FACTS AND OTHER ESSAYS
WILLIAM GRAHAM SUMNER1916 年出版450 页ISBN：
THE CHALLENGE OF EFFECTIVE SPEAKING TENTH EDITION
RUDOLPH F.VERDERBER2222 年出版488 页ISBN：
THE CHALLENGE OF EFFECTIVE SPEAKING ELEVENTH EDITION
RUDOLPH F.VERDERBER2000 年出版372 页ISBN：
THE CHALLENGE OF EFFECTIVE SPEAKING NINTH EDITION
RUDOLPH F.VERDERBER1994 年出版436 页ISBN：0534163327
SINGLE-CAMERA VIDEO:THE CREATIVE CHALLENGE
MICHAEL H.ADAMS1992 年出版359 页ISBN：0697097609
THE MANAGERIAL CHALLENGE OF NEW OFFICE TECHNOLGY
JARRY J.OTWAY MALCOLM PELTU2222 年出版0 页ISBN：
COPYRIGHT AND THE CHALLENGE OF THE NEW
BRAD SHERMAN AND LEANNE WISEMAN2012 年出版0 页ISBN：
THE EXECUTIVE CHALLENGE：MANAGING CHANGE AND AMBIGUITY
MICHAEL B.MCCASKEY，HARVARD UNIVERSITY2222 年出版231 页ISBN：0273018469
THE CHALLENGE OF SEXUALITY IN HEALTH CARE
HAZEL HEATH AND ISABEL WHITE2002 年出版286 页ISBN：9780632048045
