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Stamps of
Spain
,
15th Colloquium Spectroscopicum Internationale
issue
List
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Catalog
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All issuers
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1 to 1 of 1
postage
1969
, May 26
15th Colloquium Spectroscopicum Internationale issue
unwmk
p.
14
X
1.50p
multi
spectrum
1 to 1 of 1