Title: Materīaly ob ėkonomicheskom polozhenīi i professīonalʹnoĭ organizat͡sīi Peterburgskikh rabochikh po metallu
Subjects: Metal-workers, Labor unions, Soi͡uz rabochikh po metallu (Leningrad, R.S.F.S.R.)
Places: Russia (Federation), Saint Petersburg, Soviet Union