-
11
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12
-
13
-
14
Traffic control devices, visibility, and rail-highway grade crossings, 2003.
Argitaratua 2003Liburua -
15
-
16
-
17
Traffic control devices, visibility, and rail-highway grade crossings, 2001.
Argitaratua 2001Liburua -
18
-
19
Traffic control devices, visibility, and rail-highway grade crossings 2000.
Argitaratua 2000Liburua -
20
-
21
Highway capacity, quality of service, and traffic flow and characteristics.
Argitaratua 1999Liburua -
22
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23


