Não informado. (1968). SPECTROSCOPY LETTERS: AN INTERNATIONAL JOURNAL FOR RAPID COMMUNICATION. Marcel Dekker.
Chicago-viite (17. p.)Não informado. SPECTROSCOPY LETTERS: AN INTERNATIONAL JOURNAL FOR RAPID COMMUNICATION. New York: Marcel Dekker, 1968.
MLA-viite (8. p.)Não informado. SPECTROSCOPY LETTERS: AN INTERNATIONAL JOURNAL FOR RAPID COMMUNICATION. Marcel Dekker, 1968.
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