News & CommentScientific Events

THE GRADUATE SCHOOL OF THE U. S. DEPARTMENT OF AGRICULTURE

+ See all authors and affiliations

Science  14 Sep 1928:
Vol. 68, Issue 1759, pp. 246-247
DOI: 10.1126/science.68.1759.246-a

This is a PDF-only article. The first page of the PDF of this article appears below.

PDF extract preview