1390-860X 1390-860X S1390-860X2019000200080 Venezuela Ecuador Ecuador 00 12 2019 00 12 2019 22 80 89

2004 2001 2016 2000 2017 2013 ASTM 2014 2017 ASTM 2017 1997 2016 2012 2010 2009 2013 ASM 2002