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[Subject: Psychology]
- Argraff neu ymddangosiad twyllodrus
Translated by: RHISIART HINCKS
Translated in 76 languages
[Subject: Biology]
Translated in 48 languages
[Subject: Light & Paraphotic Phenomena]
- Rhywbeth a welir er nad ydyw yno mewn gwirionedd, e.e. dŵr yn yr anialwch neu ar ffordd pan fo'n boeth
Translated in 23 languages
Translated in 11 languages
[Subject: Relation Of Natural Factors]
Translated in 10 languages