West German Economics Minister Karl Schiller said to-day [November 21, Bonn] that financial leaders of the 10 major non-Communist industrial countries were facing very difficult problems in their efforts to solve the current international monetary crisis. He told reporters after a three-hour session on the second day of the conference of Ministers and Central Bank Governors of the ‘Group of Ten’ that a lot of time would still be required to work out solutions. More than 100 delegates of the group began an emergency conference yesterday in a bid to end recent massive speculation against the French franc. The Group of Ten are the United States, Canada, Britain, France, West Germany, Belgium, the Netherlands, Italy, Sweden and Japan.