Gaya APA
Dowling, J. W. F.. (1982).
Natural asphalts: their occurance, properties and use in road construction in Columbia .
:
TRRL.
Gaya Chicago
Dowling, J. W. F..
Natural asphalts: their occurance, properties and use in road construction in Columbia.
:
TRRL,
1982.
Chart.
Gaya MLA
Dowling, J. W. F..
Natural asphalts: their occurance, properties and use in road construction in Columbia.
:
TRRL,
1982.
Chart.
Gaya Turabian
Dowling, J. W. F..
Natural asphalts: their occurance, properties and use in road construction in Columbia.
:
TRRL,
1982.
Chart.