TY - RPRT TI - Probabilities of vertical overlap : a sensitivity analysis AU - Hung, Howard K AU - Gilsinn, Judith F AU - Hoffman, Karla L PY - 1980 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 80-1990 DO - 10.6028/NBS.IR.80-1990 ER -