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1 to 3 of 3

Nicaragua

postage

1971, May 15 Physical Laws and Mathematical Formulas issue unwmk (no perf info)

-

2cord

multi

Archimedes

Paraguay

1989, May 30 800th Anniversary of the Port of Hamburg b issue p. 13

-

1g

multi

Archimedes

San Marino

1982, Apr 21 Pioneers of Science issue - scientists (1982) (no perf info)

-

20l

multi

Archimedes

1 to 3 of 3