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Helms, R. N. 4 0

Illumination engineering : for energy efficient luminous environment / 6 6 R. N. Helms. - - - - - - - - . - . - 0 . - . - 0 .







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ISBN:

ISSN: 2 = =

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Nat. Bib. No.: 2

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Subjects--Corporate Names:
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LC Class. No.: / 2

Dewey Class. No.: / 2

National Agricultural Library Call No.: /

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