APA-viite (7. p.)

Não informado. (1976). Erda energy research abstracts. Energy Research and Development Administration.

Chicago-viite (17. p.)

Não informado. Erda Energy Research Abstracts. Washington: Energy Research and Development Administration, 1976.

MLA-viite (8. p.)

Não informado. Erda Energy Research Abstracts. Energy Research and Development Administration, 1976.

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