Image of an open book with a magnifying glass over an illustration titled "A useful stream", showing local residents and their livestock fetching water from a stream. Elementary hygiene for the tropics, p. 89.
Copyright:
The National Library of Medicine believes this item to be in the public domain. (More information)
Related Title(s):
Hidden treasure and Is part of: Elementary hygiene for the tropics.; See related catalog record: 61360150R