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1Published 1891, 23 september.Subjects: “…[Building materials industry.]…”
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8Published (1960 ?)Subjects: “…[Heemaf (Hengelo), Synthetic materials processing.]…”
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10by Haas, Joh. deSubjects: “…[Polva (Enkhuizen), Synthetic materials processing.]…”
Published 1967.
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11Subjects: “…[Migrant workers., Building materials industry.]…”
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12Subjects: “…[Building materials industry., Building workers.]…”
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13Subjects: “…[Building materials industry., Factory workers.]…”
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14Subjects: “…[Building materials industry., Building workers.]…”
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15by Haas, Joh. deSubjects: “…[Polva (Enkhuizen), Synthetic materials processing.]…”
Published 1967.
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16Subjects: “…[Proletariat (Novorossijsk), Building materials industry.]…”
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17Published 1932, October 16.Subjects: “…[Proletarij (Novosibirsk), Building materials industry.]…”
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18by Nieuwenhuijs, HenkSubjects: “…[Beton-Arkel., Building materials industry.]…”
Published 1979, februari.
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19Subjects: “…[Building materials industry., Building workers.]…”
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20by Haas, Joh. deSubjects: “…[Polva (Enkhuizen), Synthetic materials processing.]…”
Published 1967.
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