ทวิอักษร (Thai Wikipedia)

Analysis of information sources in references of the Wikipedia article "ทวิอักษร" in Thai language version.

refsWebsite

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archive.org

Brooks, Greg (30 มีนาคม 2015). Dictionary of the British English Spelling System (Illustrated ed.). Open Book Publishers. pp. 460ff. ISBN 978-1-78374-107-6.