https://books.google.com.mx/books?id=udCnKce9hfoC&pg=PA334&lpg=PA334&dq=bowhead+whale+heat&source=bl&ots=vM9qvSSST9&sig=LVFOIzlJW2-1cmZP7E2flf0IBr0&hl=es&sa=X&ved=0ahUKEwicrvSJjprQAhWJwiYKHdewAkE4ChDoAQhRMAo#v=onepage&q=bowhead%20whale%20heat&f=false