S. Schaefer

Differential Utilization of Proteins in Saliva from Caries-active and Caries-free Subjects as Growth Substrates by Plaque-forming Streptococci

R. Fitzgerald, I. L. Shklair, R. Cowman, 1979, Journal of dental research.

Statherin and the Proline-rich Parotid Proteins PRP II and PRP IV as Amino Nitrogen Sources for Plaque-forming Oral Streptococci

D. I. Hay, F. Oppenheim, R.A. Cowman, 1979, Journal of dental research.

Specificity of utilization of human salivary proteins for growth by oral streptococci.

R. Fitzgerald, R. Cowman, S. Schaefer, 1979, Caries research.

General Soil Map of Nebraska

M. Kuzila, J. Culver, A. Mack, 1988 .