1.
National Geographic Pocket Guide to the Mammals of North America
by Howell, Catherine, Travnice...
ISBN: 9781426216480
2.
National Geographic Pocket Guide to the Weather of North America
by Williams, Jack, Travnicek, ...
ISBN: 9781426217869
3.
National Geographic Pocket Guide to the Night Sky of North America
by Howell, Catherine Herbert, ...
ISBN: 9781426217852
4.
National Geographic Pocket Guide to Insects of North America
by Evans, Arthur V., Travnicek...
ISBN: 9781426216473