Article PDF
Rights and permissions
About this article
Cite this article
Northern Ecological Association. Nature 148, 722 (1941). https://doi.org/10.1038/148722b0
Issue Date:
DOI: https://doi.org/10.1038/148722b0
Nature volume 148, page 722 (1941)
Northern Ecological Association. Nature 148, 722 (1941). https://doi.org/10.1038/148722b0
Issue Date:
DOI: https://doi.org/10.1038/148722b0