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060510s1948 |||a fr||||| |0 0|eng d |
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|a 621.371
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|a Ionospheric radio propagation
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|a Washington :
|b National bureau of standars,
|c 1948.
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|a 209 p.
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|a Ubic.:621.371 E 4 Ej.1 PRES
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|a ONDAS ACUSTICAS
|9 265271
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650 |
1 |
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|a PROPAGACION DE ONDAS
|9 266036
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650 |
1 |
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|a IONOSFERA
|9 270015
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|a Estados Unidos. Departament of Commerce
|9 270016
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|c LIB
|6 _
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|a MON
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|a 3528
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|a Registro convertido en forma automatizada
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|a SV
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|c 3417
|d 3417
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|a AR-LpUFI
|c AR-LpUFI
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