Cynhyrchwyd gan = Produced by: Canolfan Astudiaethau Addysg.
Ar ben y wyneb ddalen = At head of title page: Sefydliad Cenedlaethol er Ymchwil i Addysg yn Lloegr a Chymru = National Foundation for Educational Research in England and Wales.
Cynnwys: Llyfr 64t, caset = Book 64p, cassette.
Chwaraeon. ISBN 1856440176. Published by Canolfan Astudiaethau Addysg in 1990. Publication and catalogue information, links to buy online and reader comments.