Article PDF
Rights and permissions
About this article
Cite this article
Porterfield, J. Books brief. Nature 257, 258 (1975). https://doi.org/10.1038/257258b0
Issue Date:
DOI: https://doi.org/10.1038/257258b0
Nature volume 257, page 258 (1975)
Porterfield, J. Books brief. Nature 257, 258 (1975). https://doi.org/10.1038/257258b0
Issue Date:
DOI: https://doi.org/10.1038/257258b0