"The only practical way of saving humanity from nuclear devastation," is to establish a permanent, independent, U.N. peace force, said Zenon Rossides, Cypriot Ambassador to the United Nations and the United States, last night.

Citing this native country as a case in besides maintained that peace could not be kept by a force that represented individual nations, rather than the U.N. Whe a crisis arises in the world today, he said, there are too many decisions that have to be reached by too many independent countries, before a peace force can be assembled.

Rossides called for the creation of a special force of 60,000-70,000 men, which would be financed by a "Peace Force Fund." Each unit of the force, he maintained, should be of international composition.

If such a force were established, it would not have to be very large, simply because the "presence of such a force to prevent aggressive action would be enough" to prevent such aggression, he asserted.

The smaller nations would learn that these U.N. forces could prevent aggression, and they would cut down on their military expenditures. The larger nations would follow, he said.

Cyprus has been in a state of crisis since December 1963, when fighting broke out between the ethnic Greek and Turkish population over Greek Cypriot efforts to obtain greater political control through constitutional revision. U.N. forces have been in Cyprus since March, 1964.