Home › Authors › O. B. Martin 👤 O. B. Martin b. 1870 – d. 1935 · 5 books Books by O. B. Martin How the Extension Service aids farmers in times of crisis 1934 A decade of Negro extension work, 1914-1924 1926 Canning club and home demonstration work 1915 Development of the Boys' club work 1915 Results of demonstration work in boys' and girls' clubs in 1912 1913