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postage

1998, Mar 31 20th Century issue unwmk p. 13.25 (17 stamps)

-	350L	multi
-	700L	multi
-	800L	multi	Alexander Fleming discoverer of Penicillin (1999)
-	900L	multi	Guglielmo Marconi 1874-1937 radio telegraph
-	1100L	multi	Henri Coanda
-	1500l	multi	Albert Einstein 1879-1955 Theory of Relativity
-	1500l	multi	Karl Landsteiner discoverer of blood groups (1999)
-	1600L	multi	Louis Blériot
-	2000l	multi	Opening the Panama Channel
-	2600l	multi	October Revolution
-	3000l	multi	League of Nations 1920 (1999)
-	3000l	multi	Nicolae Paulescu (1999)
-	3900l	multi	T Vuia 1872-1950 aircraft
-	7300l	multi	heavy water diagram & H. C. Urey (1999)
-	7300l	multi	Otto Hahn discoverer of nuclear fission (1999)
-	17000L	multi	First marine drilling platform in Texas 1934 (1999)
-	17000L	multi	Ernst Ruska & electron microscope (1999)

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