Gertie and Gus : the guinea pigs /
by Gisela Buck and Siegfried Buck ; [photographer: Elvig Hansen ; tr. by John E. Hayes].
- Milwaukee, WI : G. Stevens, 1997.
- p. cm.
- Real baby animals .
Includes bibliographical references and index.
Describes the activities of two guinea pigs from the time they are born until they are two months old.