A study of the number of doctorates conferred by American universities. Raymond M. Hughes page page 609
Iowa Ascomycetes II. Diaporthaceae: Valseae. Joseph C. Gilman, L.H. Tiffany, and R.M. Lewis page 623
Seed characters of selected plant families. David S. MC Clure page 649
Author and Subject Indices. 683
"Iowa State College Journal of Science 31.4,"
Iowa State Journal of Research: Vol. 31
, Article 1.
Available at: https://lib.dr.iastate.edu/iowastatejournalofresearch/vol31/iss4/1