|This was our textbook. Still useful reading.|
It amazes me that my old gamma card has survived several moves of house. It shows just how infrequently I revisit the contents of the particular box it was in. I had completely forgotten it. On a whim I sent the pix of my old card to ISI and asked them if their records go back this far. ISI itself was still a "teenager" in 1976 (founded in 1959). If their records are intact I wonder if they have a record of me passing Delta. Didn't find that card. I do remember working on FS-1 elements before leaving Delaware.
Opening an old box introduces so many questions. I still don't know how that bird got into the house.