Untitled (Coded Algorithmic Drawing)

signed and dated lower right in graphite hardware: IMB Mainframe Computer software: FORTRAN in batch mode using 16 BPI tape output machine: CALCOMP Drum Plotter created using the Geography Department’s CALCOMP Drum Plotter at Northern Illinois University California Computer Products, Inc. mark printed along the left edge of the paper

Untitled (Coded Algorithmic Drawing)

signed and dated lower right in graphite hardware: IMB Mainframe Computer software: FORTRAN in batch mode using 16 BPI tape output machine: CALCOMP Drum Plotter created using the Geography Department’s CALCOMP Drum Plotter at Northern Illinois University California Computer Products, Inc. mark printed along the left edge of the paper