1.   A third major source of short-term financing, commercial paper, is available to large firms with high-quality credit ratings.

2.   Both Aristotle and Plato, our major sources of information about the golden age of Athenian democracy, were deeply critical.

3.   But as we have seen, failures and mistakes are major sources of vital experience.

4.   Coal has been displaced by natural gas as a major source of energy.

5.   Disturbed soils are an additional major source of atmospheric carbon.

6.   Drillholes for oil and other resource exploration are major sources of information for geologists.

7.   I hope that this book will be a major source of practical advice and assistance and will encourage the return of practitioners.

8.   In either case, the sea urchins could lose a major source of food.

9.   In many cultures, children remain the major source of status for women.