BALLENAS, DELFINES Y MARSOPASde Erich Hoyt, Mark CarwardineEdiciones (1)BALLENAS, DELFINES Y MARSOPAS (1999)OMEGA · ISBN 9788428211635Más obras de Erich HoytCConserving the wild relatives of cropsConserving the wild relatives of cropsCCreatures of the deepCreatures of the deepThe earth dwellers