Atlas of the world's resources

＜図書＞
Atlas of the world's resources


1	v. 1 The agricultural resources of the World / William van Royen in cooperation with Bureau of Agricultural Economics, U. S. Department of Agriculture New York : Prentice-Hall, for the University of Maryland , 1954
2	vol. 2 The mineral Resources of the World / by William van Royen, Oliver Bowles ; in collaboration with Elmer W. Pehrson New York : Prentice-Hall, for the University of Maryland , 1952