This material was shipped to Fenwick Library Special Collections, George Mason University, Fairfax, VA on 23 October 2000. This cell-pack contains enlarged page-size figures of the eleven illustrations used in Warfield's 1978 manuscript Understanding Delta Charts. (We have printouts of ten of the figures, the eleventh figure titled Example Delta Chart for Program Planning is missing, but is page 25 of the manuscript paper.) List of cells in cell-pack: 1. Activity Box, 2. Filled in Activity Box, 3. Activity Box with Blank upper Cell, 4. Showing time precedence, 5. Example Delta Chart showing an event, 6. Symbol for a concluding event, 7. Decision box with three options, 8. Illustrating the use of a decision box, 9. Symbols for logic boxes, 10. Delta Chart of part of oboe-reed-making process, 11. Example Delta Chart for program planning (missing page printout).
