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B
Bob Ostrom
3 books
Books by Bob Ostrom
The Magic School Bus Blows Its Top: A Book About Volcanoes
Joanna Cole, Gail Herman, Bob Ostrom
The Magic School Bus Gets Planted: A Book About Photosynthesis
Bruce Degen, Joanna Cole, Bob Ostrom, Lenore Notkin, Ronnie Krauss
The Magic School Bus Going Batty: A Book About Bats
Bruce Degen, Joanna Cole, Nancy E. Krulik, Bob Ostrom