Publisher

N.A	1
National Observatory	3
US geogological survey	4
Washington US Geogological Survey 1914	1
Washington US Geographical Survey 1904	1
Washington US Geological Survey	1
Washington US Geological Survey 1897	11
Washington US Geological Survey 1898	1
Washington US Geological Survey 1899	10
Washington US Geological Survey 1901	1
Washington US Geological Survey 1906	1
Washington US Geological Survey 1911	1
Washington US Geological Survey 1914	34