Knowles, R., & Blackburn, T. H. (1993). Nitrogen isotope techniques. Academic Press.
Cita Chicago Style (17a ed.)Knowles, Roger, y T. Henry Blackburn. Nitrogen Isotope Techniques. San Diego: Academic Press, 1993.
Cita MLA (8a ed.)Knowles, Roger, y T. Henry Blackburn. Nitrogen Isotope Techniques. Academic Press, 1993.
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