2
Έκδοση 1964
Full text available from Linguistics Database: 01/01/2010 to 01/31/2017
Ηλεκτρονική πηγή Περιοδική έκδοση
4
Έκδοση 1989
Full text available from Library Science Database: 01/01/2017 to present
Ηλεκτρονική πηγή Περιοδική έκδοση
5
Έκδοση 2010
Full text available from Earth, Atmospheric & Aquatic Science Database: 01/01/2008 to 12/31/2008
Full text available from Earth, Atmospheric & Aquatic Science Database: 01/01/2010 to 01/31/2010
Ηλεκτρονική πηγή Περιοδική έκδοση
7
Έκδοση 1998
Full text available from Earth, Atmospheric & Aquatic Science Database: 01/01/2012 to present
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Full text available from Research Library: 01/01/2012 to present
Ηλεκτρονική πηγή Περιοδική έκδοση
8
Full text available from ABI/INFORM Trade & Industry: 02/01/2009 to present
Ηλεκτρονική πηγή Περιοδική έκδοση
9
Έκδοση 2000
Full text available from East Europe, Central Europe Database: 01/01/2015 to 01/31/2016
Ηλεκτρονική πηγή Περιοδική έκδοση
10
Έκδοση 1968
Full text available from ABI/INFORM Global: 01/01/2007 to present
Full text available from East Europe, Central Europe Database: 01/01/2007 to present
Full text available from Social Science Database: 01/01/2007 to present
Ηλεκτρονική πηγή Περιοδική έκδοση
11
Full text available from ABI/INFORM Global: 01/01/2011 to present
Full text available from Accounting & Tax Database: 01/01/2011 to present
Full text available from East Europe, Central Europe Database: 01/01/2011 to present
Ηλεκτρονική πηγή Περιοδική έκδοση
12
Έκδοση 2005
Full text available from ABI/INFORM Global: 01/01/2011 to present
Full text available from East Europe, Central Europe Database: 01/01/2011 to present
Full text available from Research Library: 01/01/2011 to present
Ηλεκτρονική πηγή Περιοδική έκδοση
13