Books
My "j" Book
1964
ISBN 9780717265091
My 'l' Sound Box
1977
ISBN 9780895650450
My "G" Sound Box
1979
ISBN 9780895650535
MY FIRST BOOK,
1984
ISBN 9780717265497
!Adónde van los residuos?
1992
ISBN 9789507242168- No cover
垃圾到哪里去了?
1995
ISBN 9789623475884