APA

Lehtinen E., . (1970). On the evenness of Finnish road surfaces as related to traffic engineering and road construction. Helsingfors: Valtion Teknillinen Tutkimuslaitos. Julkaisu [publication] nr 159.

Chicago

Lehtinen E, . 1970. On the evenness of Finnish road surfaces as related to traffic engineering and road construction. Helsingfors: Valtion Teknillinen Tutkimuslaitos. Julkaisu [publication] nr 159.

Harvard

Lehtinen E., . (1970). On the evenness of Finnish road surfaces as related to traffic engineering and road construction. Helsingfors: Valtion Teknillinen Tutkimuslaitos. Julkaisu [publication] nr 159.

MLA

Lehtinen E, . On the evenness of Finnish road surfaces as related to traffic engineering and road construction. Helsingfors: Valtion Teknillinen Tutkimuslaitos. Julkaisu [publication] nr 159. 1970.