The first comprehensive theories of management appeared around 1920.

This is the earliest text in which the theory appears.

One area where this theory appears to have borne fruit is tourism.

Many theories have appeared in specialized publications, but none is based on documentary evidence.

Here a theory appeared to be proved in practice!

This is when various theories such as relationship marketing in industrial and consumer market appeared.

The theory of limited government appears to demand more than simple majority rule.

This theory appeared in the press within days of the incident, and is supported by Churchill himself.

Federal officials, who do not dispute the national growth in homeless families, say both theories appear to have merit.

However, this theory appears to have been debunked recently.