81
Publicerad 2014
Full text available from Environmental Science Database: 01/01/2014 to present
Elektronisk Periodisk publikation
91
Publicerad 2011
Full text available from Engineering Database: 06/01/2011 to 12/31/2018
Elektronisk Periodisk publikation
95
Full text available from Canadian Newsstream: 05/19/2011 to 08/09/2018
Elektronisk Periodisk publikation
97
Publicerad 1998
Full text available from ABI/INFORM Global: 01/01/1998 to 1998
Elektronisk Periodisk publikation
98
Full text available from Canadian Newsstream: 06/27/2003 to present
Elektronisk Periodisk publikation