BANGKOK,Thailand (AP) - Cambodia has rejoined other Indochinese nations in a new

cooperative effort to develop the mighty Mekong river, reports from Hanoi seen Feb.

6 said.

The Vietnam news agency said a joint communique was signed Friday in Hanoi, the Vietnamese

capital, by officials of Vietnam, Cambodia, Laos and Thailand.

The communique paves the way towards a formal treaty among the riparian nations and

an institution which would deal with the river's problems and potential.