Archive file citation conventions?

[Paul B. Gallagher]

Can anyone tell me whether there are standard renditions for these codes 
(my archive document cites this source from a student record):

Оп. 7Л. Св. 469, Д. 3416а, Л. 1–24.

I assume, for example, that "Л. 1–24" is "pp. 1–24," but I'm not sure 
how best to render the others.

Votes for straight transliteration will also be considered if you can 
justify that position.

Thanks.

-- 
War doesn't determine who's right, just who's left.
--
Paul B. Gallagher
pbg translations, inc.
"Russian Translations That Read Like Originals"
http://pbg-translations.com

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