Sentence examples for been an indispensable source from inspiring English sources

The presidential historian Robert Dallek, who drew heavily on the Kissinger materials for his 2007 book, "Nixon and Kissinger: Partners in Power," said the tapes made by Presidents John F. Kennedy, Johnson and Nixon had been an indispensable source for historians.

Our papers have been an indispensable source of information for many of our communities for more than a century, and that will not cease.

This type of approach is well established and has been an indispensable source of information within the current efforts to reform US healthcare[ 9].

— Paul, New Jersey A. The Times is an indispensable source of quality information.

The Tone River is an indispensable source of water for irrigation throughout its populous drainage basin.

In any company, in-house documents are an indispensable source of information for production.

This collection is an indispensable source of information for researchers in biochemistry, biotechnology, organic and analytical chemistry, and food sciences.

Accounting for almost 40 percent of the world's vegetable oils, it is an indispensable source of vitamins and calories.

Testing the vibration behaviour of present vehicles is an indispensable source of knowledge for further improvement of vehicle dynamics.

In any company, electronic data on Interactive Information Systems is an indispensable source of information for production (quality, safety. reactivity. etc).

Procopius, (born probably between 490 and 507, Caesarea, Palestine [now in Israel]), Byzantine historian whose works are an indispensable source for his period and contain much geographical information.