It goes so far that in almost all cases, where one group occurs, the other does not.

Earlier groups concerned about history and historical preservation occurred in the 1890s and 1920s.

Repeating groups of telephone numbers do not occur in this design.

In freshwater systems, groups occur most often in autumn and during early winter.

Various other group and solo performance opportunities occur during the year.

May 27 A small group of touchdowns occurred over western Kansas.

During the next day the scouting party spotted a group of four Indians along the trail and a brief gun fight occurred.

A single group usually contains at least one adult male, but mixed groups with multiple males do also occur.

Thus, the 150-member group would occur only because of absolute necessity-due to intense environmental and economic pressures.

The most times in succession the group occurs is four.