1967: In his review of the range of fins available in France during that year, J. Larue[7] mentions how unnamed experts are experimenting with the use of a single swim fin accommodating both feet of the swimmer, who deploys the butterfly stroke to progress in the water. Utilizamos a plataforma http://caudas-de-sereia75297.blogkoo.com/caudas-de-sereia-fundamentos-explicado-16097946