Humbert, F. L. (1968). Selection and wear of pebbles on gravel beaches.
Chicagoスタイル(17版)引用形式Humbert, Fekko Lucas. Selection and Wear of Pebbles on Gravel Beaches. [Groningen, 1968.
MLA(8版)引用形式Humbert, Fekko Lucas. Selection and Wear of Pebbles on Gravel Beaches. 1968.
警告: この引用は必ずしも正確ではありません.