It said many countries have given less than their fair share to the UN South Asian Earthquake appeal, leaving it only 19 percent funded despite UN Secretary General Kofi Annan's urgent call for help last week.

Oxfam named seven rich countries which have so far given nothing to the UN appeal in the wake of the October 8 temblor -- Belgium, France, Austria, Finland, Greece, Portugal and Spain.

It also identified four that have given less than one-fifth of their fair share -- the United States (nine percent), Italy (seven percent), Germanypercent) and Japan (17 percent).

By contrast, it said Sweden, Luxembourg, The Netherlands and Denmark have given more than their fair share, and that even Poland and Chile have managed to contribute something.

While acknowledging that some governments have given resources outside of the UN appeal, Oxfam said ensuring that the UN goal is met is vital to the success of the aid effort.

Oxfam based its assessment of a nation's fair share on the relative size of its economy within the Organisation for Economic Cooperation and Development (OECD).

Donor nations meet Wednesday in Geneva where they will face fresh pleas to contribute tents, helicopters and relief cash before winter snows add to the death toll of more than 53,000 people.