| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Vitamin A supplements: A guide to their use in the treatment and prevention of vitamin A deficiency and xerophthalmia | 978-92-4-154506-8 (92-4-154506-2) | 1997 |
| Vitamin A supplements: A guide to their use in the treatment and prevention of vitamin A deficiency and xerophthalmia | 978-92-4-154236-4 (92-4-154236-5) | 1988 |