2022-03-282022-03-281959https://hdl.handle.net/2152.3/113915centavos stamp from Brazil, 1968<br></br><br></br>50c stamp of William Harvey, first to recognize circulation of the blood in the human body. Argentina, 1959<br></br><br></br>Cover of Argentina, 1959, 50c William Harvey stamp postdated May 20, 1960.Two stamps and one cover.Postage-stamp albumsStamp collectingHarvey, William, 1578-1657BrazilArgentinaStamped envelopes