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Now showing items 1-10 of 65
Ten Mathematical Equations 6
(1971)
First-day cover with five stamps from The Ten Mathematical Equations that Changed the Face of the Earth series. Issued by Nicaragua on May 15, 1971.
Donation of Blood and Blood Transfusion 2
(1959)
Two stamps and one cover.
Donation of Blood and Blood Transfusion Introduction
(1971)
Three pages of introductory text to the Blood Donation album.
Ten Mathematical Equations 7
(1971)
First-day cover with five stamps from The Ten Mathematical Equations that Changed the Face of the Earth series. Issued by Nicaragua on May 15, 1971.
Many Years of Effort Behind Blood Donor Stamp
(1971)
History of push to create blood donor stamps in the United States.
Donation of Blood and Blood Transfusion 1
(1958)
Four stamps featuring blood transfusion.
Ten Mathematical Equations 2
(1971)
Two stamps from The Ten Mathematical Equations that Changed the Face of the Earth series. Issued by Nicaragua on May 15, 1971.
Ten Mathematical Equations 4
(1971)
Two stamps from The Ten Mathematical Equations that Changed the Face of the Earth series. Issued by Nicaragua on May 15, 1971.
The Atomic Era 5
(1956)
Four Stamps.
Ten Mathematical Equations 3
(1971)
Two stamps from The Ten Mathematical Equations that Changed the Face of the Earth series. Issued by Nicaragua on May 15, 1971.