Z O Anderson: 2 books

A team of time travelers believes they have changed history for the better. They return from prehistoric time to a more advanced USA and a better way of life. The team leader wants to go back and correct the paradox and change things back to the way they were, because he wants to time travel back...

Discusses ways of ensuring genetic diversity, advances in wheat breeding and their use to improve properties such as drought resistance and cold tolerance; Summarises research on factors affecting nutritional and other aspects of wheat quality; Reviews advances in understanding wheat pests and diseases...