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Archival Status
American Society of Civil Engineers
CLOCKSS Archive
1, 2, 4, 5
Portico
Preserved : 2011: 1(1-4), 2012: 2(1-4), 2013: 3(1-4), 2014: 4(1-4), 2015: 5(1-4), 2016: 6(1-4), 2017: 7(1-4)
2, 3, 6, 7