by Koo, E. C., Bagga, S., Songstad, D. D., Betz, S. R., Kuehn, G. D., Phillips, G. C.
Published in In vitro cellular & developmental biology. Plant (01.07.1998)

by Betz, R S
Published in The Journal of the American Dental Association (1939) (01.04.1992)

by Betz, R S
Published in The Journal of the American Dental Association (1939) (01.06.1973)

by Sanders, J B
Published in The Journal of the American Dental Association (1939) (01.06.1973)