Field operations of the Bureau of soils.

1899; 1899 maps; v.2 1900; v.2 1900 maps; v.3 1901; v.3 1901 maps; v.4 1902; v.4 1902 maps; 1903 maps; v.5 1903; v.5 1903 maps; 1904 maps; v.6 1904 maps; v.6 1904; 1905 maps; v.7 1905 maps; v.7 1905; 1906 maps; v.8 1906 maps; v.8 1906; 1907 maps; v.9 1907 maps; v.9 1907; v.10 1908 maps; v.10 1908; 1909 maps; v.11 1909; v.11 1909 maps; v.12 1910; v.12 1910 maps; v.13 1911; v.13 1911 maps; 1912 maps; v.14 1912; v.14 1912 maps; 1913 maps; v.15 1913; 1914 maps; v.16 1914; v.16 1914 maps; 1915 maps; v.17 1915; v.17 1915 maps; v.18 1916; v.19 1917 maps; v.19 1917; v.20 1918; v.20 1918 maps; 1919 plate 39; v.21 1919 maps; v.21 1919; v.22 1920; v.22 1920 maps; v.23 1921 maps; v.23 1921; v.24 1922; v.24 1922 maps