| 978-958-600-833-4 | My happy class | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-841-9 | My Happy class - Cassette (Pre-school) | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-842-6 | My Happy class - Cassette N° 1 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-843-3 | My Happy class - Cassette N° 2 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-844-0 | My Happy class - Cassette N° 3 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-845-7 | My Happy class - Cassette N° 4 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-846-4 | My Happy class - Cassette N° 5 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-847-1 | My Happy class - Cassette N° 6 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-853-2 | My Happy class - Teacher's Edition N° 5 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-834-1 | My happy class - Student book (pre-school) | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-835-8 | My Happy class - Sudent Book Nº 1 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-837-2 | My Happy Class - Sudent Book No. 3 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-838-9 | My Happy class - Sudent Book N° 4 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-839-6 | My Happy class - Sudent Book N° 5 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-840-2 | My Happy class - Sudent Book N° 6 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-848-8 | My Happy class - Teacher´s Edition (Pre-school) | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-851-8 | My Happy class - Teacher´s Edition N° 3 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-855-6 | My Happy class - Teacher´s Cassette Preescolar | McGraw-Hill Interamericana | Acheson Duncan J.
AnaIsabel Velásquez Arce (de)
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-852-5 | My Happy class -Teacher´s Edition N° 4 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-836-5 | My Happy Class - Student Book Nº 2 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-856-3 | My Happy class - Teacher´s Cassette N° 1 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-857-0 | My Happy class - Teacher´s Cassette N° 2 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-858-7 | My Happy class - Teacher´s Cassette N° 3 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-859-4 | My Happy class - Teacher´s Cassette N° 4 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |
| 978-958-600-860-0 | My Happy class - Teacher´s Cassette N° 5 | McGraw-Hill Interamericana | AnaIsabel Velásquez Arce (de)
Francis Duncán
Melba Libia Cárdenas Beltran
| 1998 |