단행본

Bertha＇s secret battle

개인저자

Coldwell, JohnWeir, Doffy 

서명/저자사항

Bertha＇s secret battle /by John Coldwell ;illustrated by Doffy Weir 

발행사항

UK :Oxford,2005 

형태사항

32p. :ill ;20cm 

총서사항

Oxford reading tree ;Stage 11-[2]Treetops fiction