Good researchers use multiple sources to find a range of information on their topic.
They need to learn that different books will yield different kinds of information on a topic and that all books will not be equally useful in helping find out what they want to know. Using a chart to compare various sources is a good way to help children understand this idea. And he tells what he did when he was young. Tells about how computers and airplanes are used now on ranches, about new laws and women as cowboys. No index, references, or bibliography.