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Another First-Century Penthemeros-CertificateW. H. M. Liesker and P. J. SijpesteijnHabelt1988DOI 10.2307/20186796
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A First-Century Penthemeros Certificate (P. Mich. inv. 970)Gerald M. BrowneBrepols Publishers, NV1970DOI 10.1484/j.cde.2.308189
Survey review: Some new materials for Cambridge First CertificateM. VinceELT Journal1985DOI 10.1093/elt/39.1.50
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The TESOL Encyclopedia of English Language TeachingLiontas, John I.The TESOL Encyclopedia of English Language Teaching2018DOI 10.1002/9781118784235.eelt0760
Mathematics in the First School Certificate: A Discussion at the London BranchThe Mathematical AssociationThe Mathematical Association1930DOI 10.2307/3607163