21
Έκδοση 1960
Full text available from Arts & Humanities Database: 04/01/1992 to 12/31/2015
Full text available from Research Library: 04/01/1992 to 12/31/2015
Full text available from UK & Ireland Database: 04/01/1992 to 12/31/2015
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
22
Full text available from Arts & Humanities Database: 12/01/2006 to present
Full text available from Research Library: 12/01/2006 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
23
Έκδοση 1983
Full text available from Engineering Database: 01/01/2010 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
24
Έκδοση 2002
Full text available from Canadian Business & Current Affairs Database: 09/01/2002 to 09/30/2008
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
25
Full text available from Arts & Humanities Database: 12/01/1995 to present
Full text available from Canadian Business & Current Affairs Database: 12/01/1995 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
26
Full text available from Arts & Humanities Database: 2005 to 08/01/2007
Full text available from Research Library: 2005 to 08/01/2007
Full text available from Materials Science Database: 03/01/2005 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
27
Έκδοση 2014
Full text available from Arts & Humanities Database: 12/01/2014 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
28
Full text available from Arts & Humanities Database: 10/01/2010 to present
Full text available from Engineering Database: 10/01/2010 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
30
Έκδοση 1983
Full text available from Engineering Database: 01/01/1997 to 01/31/2001
Full text available from Research Library: 01/01/1997 to 01/31/2001
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
31
Έκδοση 1977
Full text available from Education Database: 01/01/1988 to 08/31/1992
Full text available from Research Library: 01/01/1988 to 08/31/1992
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
32
Έκδοση 2003
Full text available from Arts & Humanities Database: 01/01/2003 to 05/31/2017
Full text available from Australia & New Zealand Database: 01/01/2003 to 05/31/2017
Full text available from Engineering Database: 01/01/2003 to 05/31/2017
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
34
Έκδοση 1986
Full text available from ABI/INFORM Trade & Industry: 01/09/2003 to 06/30/2011
Full text available from Arts & Humanities Database: 01/09/2003 to 06/30/2011
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
35
Έκδοση 1982
Full text available from Career & Technical Education Database: 10/01/2013 to 12/31/2015
Full text available from Research Library: 10/01/2013 to 12/31/2015
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
36
Έκδοση 1978
Full text available from Research Library: 11/01/1997 to 03/31/2002
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
37
Full text available from Arts & Humanities Database: 02/01/2009 to 08/31/2016
Full text available from Materials Science Database: 02/01/2009 to 08/31/2016
Full text available from Research Library: 02/01/2009 to 08/31/2016
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
40
Full text available from Arts & Humanities Database: 01/01/2003 to 01/31/2008
Full text available from Research Library: 01/01/2003 to 01/31/2008
Ηλεκτρονική πηγή Περιοδική έκδοση