Hector Viveros Lee Related books I Had a Hippopotamus Lee & Low Books • 1996 I Had a Hippopotamus Lee & Low Books I Had a Hippopotamus Lee & Low Books • 1999 Yo Tenia Un Hipopotamo / I Had a Hippopotamus Lee & Low Books Yo Tenia UN Hipopotamo/I Had a Hippopotamus Lee & Low Books Yo tenia un hippopotamo Lee & Low Books • 1999