scientific article published in September 1902

Washington [D.C.]: United States Geological Survey, 1886

scholarly article by Esper S. Larsen, Jr. published in January 1956

scientific article published in 1896

Washington,: Govt. Print. Off., 1896.

scholarly article published in 1912

scientific article published in October 1882

scientific article

scientific article published in February 1884

scientific article published in June 1882

scientific article published in August 1882

scientific article published in 1915

scholarly article

scientific article published in 1894