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Systems Analysis. Nature 239, 359 (1972). https://doi.org/10.1038/239359a0
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DOI: https://doi.org/10.1038/239359a0
Nature volume 239, page 359 (1972)
Systems Analysis. Nature 239, 359 (1972). https://doi.org/10.1038/239359a0
Issue Date:
DOI: https://doi.org/10.1038/239359a0