vii, 69 pages, 8 unnumbered pages of plates : illustrations (some colour), forms ; 24 cm

Vitamin A deficiency and its consequences : a field guide to detection and control / Alfred Sommer.

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Sommer, Alfred, 1942- Field guide to the detection and control of xerophthalmia.

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Vitamin A deficiency and its consequences : a field guide to detection and control / Alfred Sommer.