Popov L.n Laboratornye Ispytaniia Stroitelnykh Materialov M.: Vysshaia Shkola 1984 168 S: Djvu

Similar to Libgen, searching for the ISBN or title in Russian often yields the 1984 "Vysshaya Shkola" edition.

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Search for "Popov L.N." or the Russian title "Лабораторные испытания строительных материалов" . It is frequently mirrored here in both DJVU and PDF formats. Similar to Libgen