APA

Lyly S., . (1968). The variation patterns of traffic flow as the basis of traffic census methods. Helsingfors: Tekniska högskolan i Finland.

Chicago

Lyly Sulevi, . 1968. The variation patterns of traffic flow as the basis of traffic census methods. Helsingfors: Tekniska högskolan i Finland.

Harvard

Lyly S., . (1968). The variation patterns of traffic flow as the basis of traffic census methods. Helsingfors: Tekniska högskolan i Finland.

MLA

Lyly Sulevi, . The variation patterns of traffic flow as the basis of traffic census methods. Helsingfors: Tekniska högskolan i Finland. 1968.