In the 1950s and 1960s it was an indispensable aid when traversing the vast Canadian wilderness landscape.

He saw Vizaphmal every day, and the new king seemed to cherish a real gratitude toward him for his indispensable aid in the fulfilment of the prophecy.

Show" on television - that he believes that "talking is an indispensable aid to thinking.

It is an indispensable aid to anyone who has been baffled by discontinuities in the evolution of societies and their cultures.

His commentary on Tanach - especially his commentary on the Chumash ("Five Books of Moses") - is an indispensable aid to students of all levels.

Since the first experimental satellite was launched in 1978, GPS has become an indispensable aid to navigation around the world, and an important tool for map-making and land surveying.

"Criticism" is an indispensable aid in interpreting the Old Testament.

In reality, however, they are an indispensable aid to their husband.

Many see them as an indispensable aid in the early establishment of the Yishuv, and perhaps a role model for the Zionist Movement of the time.

Metis was both a threat to Zeus and an indispensable aid (Brown 1952:133):