Byd trychinebau /
Halley, Ned.
Meek, Elin.
Qualifications, Curriculum & Assessment Authority for Wales.
Llandysul : Gwasg Gomer,
2006.
Argraffiad Saesneg gwreiddiol = Original English edition : London : Kingfisher Publications, 2005.
Addasiad Cymraeg gan = Welsh adaptation by : Elin Meek.
Yn cynnwys mynegai = Includes index.
Disasters