Gaya APA
Mayer, Harold M.. (1975).
Internal and external shipping on the Great Lakes .
:
TRB.
Gaya Chicago
Mayer, Harold M..
Internal and external shipping on the Great Lakes.
:
TRB,
1975.
Chart.
Gaya MLA
Mayer, Harold M..
Internal and external shipping on the Great Lakes.
:
TRB,
1975.
Chart.
Gaya Turabian
Mayer, Harold M..
Internal and external shipping on the Great Lakes.
:
TRB,
1975.
Chart.