What Makes a Shadow? (Let's-Read-and-Find-Out Science 1). Questo articolo non è disponibile.What Makes a Shadow? (Let's-Read-and-Find-Out Science 1)

Clyde Robert Bulla is the author of over fifty books for children including The Secret Valley and The Story of Valentine’s Day. He has been writing since 1946 when he published his first book, The Donkey Cart. Mr. Bulla was the first recipient of the Southern California Council on Children’s Literature award for distinguished contribution to the field. He lives in Los Angeles, California.