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pro vyhledávání: '"Garcia L., Ramon"'
Autor:
Garcia L., Ramon, Hanway, John J.
Publikováno v:
Agronomy Journal; July 1976, Vol. 68 Issue: 4 p653-657, 5p
Autor:
Paunzen, Ernst
This book describes the characteristics and applications of the Δa photometric system, which measures the stellar flux at around 520 nm. Since its introduction in 1976 by Hans-Michael Maitzen, the Δa system has not only been successfully applied to
