McCollum got his Ph.D. from Yale in two years, but stayed at Yale for another year as a postdoctoral researcher working with Thomas Osborne and Lafayette Mendel on problems of plant protein composition and diet.
He remained for another year as a postdoctoral researcher working with Thomas Osborne and Lafayette Mendel on plant protein and diet. McCollum got his Ph.D. from Yale in two years.
McCollum got his Ph.D. from Yale in two years. He remained for another year as a postdoctoral researcher working with Thomas Osborne and Lafayette Mendel on plant protein and diet.
McCollum got his Ph.D. from Yale in two years. He remained for another year as a postdoctoral researcher working with Thomas Osborne and Lafayette Mendel on plant protein and diet.