Ondrick, C.W. and Griffiths, J.C. 1969. FORTRAN IV Computer Program for Fitting Observed Count Data to Discrete Distribution Models of Binomial, Poisson and Negative Binomial. Bulletin (Kansas Geological Survey). (Jan. 1969), 1–20. DOI:https://doi.org/10.17161/kgsbulletin.no. 23471.