Pneuflot

http://www.mbe-cmt.com/index.php?id=49

https://www.mbe-cmt.com/fileadmin/user_upload/Download_Produktflyer/mbe_pneuflot_r_RZ_120503.pdf

https://books.google.cl/books?id=ELFH5WtoZX4C&pg=PA833&lpg=PA833&dq=Humboldt+Wedag+(Germany)+++flotation+email&source=bl&ots=KjYbCSBrWs&sig=RsVDN7JN7uYLqGgqE2O_m0dvOgE&hl=es-419&sa=X&ved=2ahUKEwi-7b7Jub7eAhXDhZAKHecYC60Q6AEwAHoECAkQAQ#v=onepage&q=Humboldt%20Wedag%20(Germany)%20%20%20flotation%20email&f=false