Gaya APA
Speirs, A.. (1987).
Concrete and Bituminous Pavement in Srilanka .
:
PTRC.
Gaya Chicago
Speirs, A..
Concrete and Bituminous Pavement in Srilanka.
:
PTRC,
1987.
Filmstrip.
Gaya MLA
Speirs, A..
Concrete and Bituminous Pavement in Srilanka.
:
PTRC,
1987.
Filmstrip.
Gaya Turabian
Speirs, A..
Concrete and Bituminous Pavement in Srilanka.
:
PTRC,
1987.
Filmstrip.