Colnect-172-826-Graph-and-computer-tapes.jpg
Source: Colnect
  • ARC-portugal61.jpg-crop-191x194at128-467.jpg
Issued by: Portugal
Function: postage
Date: 4/11/1973
Issue: Productivity Conference '72
Denom: 1e
Color: multicolored
Design: graphs
Watermark: unwmk
Perf: 14.5
Catalog value:



External links:
Colnect 64714-..ivity_Congress