J. Ulrich

Survival and regeneration of American elm callus cultures after being frozen in liquid nitrogen
Ulrich, J. M., R.A. Mickler, B.J. Finkle, and D. F. Karnosky. 1984. “Survival and Regeneration of American Elm Callus Cultures After Being Frozen in Liquid Nitrogen”. Can. J. For. Res. 14: 750-53.