http://www.mediafire.com/file/45de9lt1io942by/Resumen-ASTM%20C-39_tpr.pdf
http://www.mediafire.com/file/telgq8o99nqxr1w/ASTM%20C%2039.avi
ASTM C 127:
http://www.mediafire.com/file/odcl1rvvdpts13x/Resumen-ASTM%20C-127.pdf
http://www.mediafire.com/file/d6n567oqtzqvtdw/ASTM%20C%20127.avi
ASTM C 40:
http://www.mediafire.com/file/4vm1cby3fcq9zt4/Resumen-ASTM%20C-40.pdf
ASTM C 128:
http://www.mediafire.com/file/586d1xqre79bhrx/resumen-astm-c-128.pdf
ASTM C 143:
http://www.mediafire.com/file/3kysq1edr8cnfk3/Resumen-ASTM%20C-143.pdf
ASTM C 617:
http://www.mediafire.com/file/zkpbw1vvypfx1bj/Resumen-ASTM%20C-617_tpr.pdf
ASTM C 1231:
http://www.mediafire.com/file/liwcfavuqhx6bxt/Resumen-ASTM%20C-1231_tpr.pdf