Gaya APA
ASTM, . (1997).
ASTM C 1040 - 93 Standard test methods for density of unhardened and hardened concrete in place nuclear methods .
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ASTM.
Gaya MLA
ASTM, .
"ASTM C 1040 - 93 Standard test methods for density of unhardened and hardened concrete in place nuclear methods".
:
ASTM,
1997.
Diorama.