21. A North American field guide notes an association with apple orchards and cornfields. 22. Common and scientific names from Washington State Field Guides -Mammals of Washington. 23. They have also collaborated on numerous field guides and other natural history books. 24. Quillin also wrote several field guides relating to plants in Texas. 25. Today, each field guide has its own range, focus and organization. 26. You can't ask for much more in a field guide . 27. She stayed behind to prepare botanical illustrations for a field guide to the Islands. 28. With a notebook and field guide in hand, Euler carefully counts the arriving guests. 29. Harrison kept scrupulous notes, consulting field guides and comparing his discoveries to other collections. 30. He has also spent extensive time studying old field guides and other such material.
