Gaya APA
ASTM, . (1997).
ASTM D 2523 - 78 ; ASTM D 2523 - 00 Standard practice for testing load strain properties of roofing membranes .
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ASTM.
Gaya MLA
ASTM, .
"ASTM D 2523 - 78 ; ASTM D 2523 - 00 Standard practice for testing load strain properties of roofing membranes".
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ASTM,
1997.
Diorama.