article published in 1956

chapter published in 1956

scientific article published in 1951

scientific article published in 1949

article published in 1952

scientific article published in 1955

scientific article published in 1954

scientific article published in 1949

scientific article published in 1952

scientific article published in 1951

scientific article published in 1950

scientific article published in 1994

scientific article published in 1952

scientific article published in 1952

scientific article published in 1954

scientific article published in 1954

article published in 1953