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headquarters volunteers

Identifications of Centennial Calendar Images: December 2011

Images in A Century of Variable Star Observing: 1911-2010


December 2011: AAVSO staff and Headquarters volunteers

In Memoriam: Katherine S. Hazen

Katherine Hazen
Katherine Hazen

Katherine S. Hazen, 1905 - 2003

Arthur Ritchie

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484