ASHER I.M. 804,841 SYMPOSIUM Symposium on electron microscopy of microfibers : proceedings of the first FDA Office of Science Summer Symposium [held at the Pennsylvania State University August 23-25, 1976] / [U.S. Department of Health, Education and Welfare, Food and Drug Administration] ; ed. by I.M. Asher and P.P. McGrath. -Washington, DC : FDA, [1977]. - [4], 207 s. : il., wykr. ; 26 cm