http://www.nhsdirect.wales.nhs.uk/Encyclopaedia/s/article/slappedcheeksyndrome/
http://www.cdc.gov/parvovirusb19/about-parvovirus.html
Rhagor o wybodaeth i ddibenion ymchwil a rheoli’r anhwylder mewn menywod beichiog
https://cks.nice.org.uk/parvovirus-b19-infection