by Keltner, John L., Johnson, Chris A., Spurr, John O., Beck, Roy W.
Published in American journal of ophthalmology (01.11.1999)

by Keltner, J L, Johnson, C A, Spurr, J O, Beck, R W
Published in Archives of ophthalmology (1960) (01.07.1994)

by Keltner, John L., Johnson, Chris A., Beck, Roy W., Cleary, Patricia A., Spurr, John O.
Published in Controlled clinical trials (01.04.1993)

by Keltner, J L, Johnson, C A, Spurr, J O, Beck, R
Published in Journal of neuro-ophthalmology (01.12.1995)

by Keltner, J L, Johnson, C A, Spurr, J O, Beck, R W
Published in Archives of ophthalmology (1960) (01.02.1993)