Não informado. (1959). Geoscience abstracts. American Geological Institute.
Chicagoスタイル(17版)引用形式Não informado. Geoscience Abstracts. Washington: American Geological Institute, 1959.
MLA(8版)引用形式Não informado. Geoscience Abstracts. American Geological Institute, 1959.
警告: この引用は必ずしも正確ではありません.