Gaya APA
Heels, P.. (1976).
Elasticity estimates for public transport fares outside large urban areas .
:
PTRC.
Gaya Chicago
Heels, P..
Elasticity estimates for public transport fares outside large urban areas.
:
PTRC,
1976.
Computer Software.
Gaya MLA
Heels, P..
Elasticity estimates for public transport fares outside large urban areas.
:
PTRC,
1976.
Computer Software.
Gaya Turabian
Heels, P..
Elasticity estimates for public transport fares outside large urban areas.
:
PTRC,
1976.
Computer Software.