Algorithm 606: NITPACK: An Interactive Tree Package
Patrick W. Gaffney, J. Wooten and K. A. Kessel and W. R. McKinney · ACM Transactions on Mathematical Software · 1983
NITPACKThis guide is in two stages.The first stage, which involves NITREE, is required in order to add, delete, create, or modify trees.The second stage is simply the invocation of NIT.We now describe both stages in detail. Stage 1: NITREESubroutine NITREE is invoked by the statement CALL NITREE(MODE, IFAULT)where the parameters have the following meanings.