Researched and devised by Oliphant Jackson[?], MRCVS, the Jackson Ratio is a method of determining whether a tortoise, or a member of another chelonia species, is maintaining its optimum bodyweight, which is necessary for a successful hibernation
... by Dutch immigrants in the nineteenth century in West Michigan.
Free Reformed Churches in North America[?] - (Dutch Reformed - CGKN)
Netherlands Reformed Church[?]
...