Gaya APA
Spragins, F.K.. (1978).
Athabasca tar sands: occurance and commercial projects .
:
Elsevier Pub Co.
Gaya Chicago
Spragins, F.K..
Athabasca tar sands: occurance and commercial projects.
:
Elsevier Pub Co,
1978.
Text.
Gaya MLA
Spragins, F.K..
Athabasca tar sands: occurance and commercial projects.
:
Elsevier Pub Co,
1978.
Text.
Gaya Turabian
Spragins, F.K..
Athabasca tar sands: occurance and commercial projects.
:
Elsevier Pub Co,
1978.
Print.