TY - RPRT TI - The guide to available mathematical software problem classification system AU - Boisvert, Ronald F AU - Howe, Sally E AU - Kahaner, David K PY - 1990 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 4475 DO - 10.6028/NIST.IR.4475 ER -