Todd, R. (1953). Foramnifera from the lower Tertiary of Amchitka Island, Aleutian Islands. Contributions from the Cushman Foundation for Foraminiferal Research. 4: 1-7.
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Todd, R.
1953
Foramnifera from the lower Tertiary of Amchitka Island, Aleutian Islands
Contributions from the Cushman Foundation for Foraminiferal Research