Gould, Stephen Jay. Eight little piggies : reflections in natural history - Nueva York, Estados Unidos W.W. Norton & Company 1993 - 479 p. 21 cm - Biology/Natural History . Bibliografía: p. 457-465 ISBN: 0-393-31139-2 Subjects--Topical Terms: EVOLUCIONHISTORIA NATURAL Dewey Class. No.: 500.9/G736e