Willings, David Richard. How to use the case study in training for decision making [by] David R. Willings. - London, Business Publications, 1968. - A Business management book . Bibliography: p. 269-270. ISBN: 55/- LCCN: 68089308 Nat. Bib. No.: B68-05737 Subjects--Topical Terms: Case method. LC Class. No.: HD20 / .W538 Dewey Class. No.: 658/.001/86