2
Published 1991
Full text available from ABI/INFORM Trade & Industry: 10/01/1994 to 10/31/2014
Electronic Journal
15
Published 2012
Full text available from Engineering Database: 01/01/2014 to present
Electronic Journal
19
Published 1998
Full text available from ABI/INFORM Global: 01/01/1998 to 12/31/2017
Electronic Journal
20