Many Amerasians have an additional difficulty: their fathers were black.

There might also be a few additional difficulties in the eating of game.

One additional difficulty is in the casting of the central role.

Two additional difficulties are of interest in transportation work.

Apart from the problems of provisioning they brought additional difficulties.

An additional difficulty is that on occasion the layout does not help.

An additional difficulty is the current stringency of environmental legislation.

But over-worry about sleep problems can also cause additional difficulty in sleeping.

Chemical weapons, and the whole question of verification, raised additional difficulties.

The report also points out there is no evidence that companies suffer additional difficulties when they do give advance notice.