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The joint NASA/Goddard-University of Maryland research program in charged particle and high energy photon detector technology [PDF]

open access: yes
Progress made in the following areas is discussed: low energy ion and electron experiments; instrument design for current experiments; magnetospheric measurement of particles; ion measurement in the earth plasma sheet; abundance measurement; X-ray data ...

core   +1 more source

A Review of Archaeoastronomy and the Maya

open access: yesBulletin of the History of Archaeology, 2015
Alexander Parmington
doaj   +1 more source

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