Manual de plantas de Costa Rica - Hammel, Barry Edward, 1946 - (Missouri Botanical Garden, 2003)

Manual de plantas de Costa Rica - Hammel, Barry Edward, 1946 - (Missouri Botanical Garden, 2007)

Manual of the Agromyzidae (Diptera) of the United States - United States. Agricultural Research Service. (U.S. Dept. of Agriculture, Agricultural Research Service, 1986)

A manual of the flora of northern Idaho - Epling, Carl, 1894 -1968 (1941)

Manual of the grasses of the United States - Hitchcock, A. S. (Albert Spear), 1865 -1935 (1935)

Manual of the grasses of the United States - Chase, Agnes, 1869 -1963 (U.S. Dept. of Agriculture, 1951)

Manual of the grasses of the United States - Hitchcock, A. S. (Albert Spear), 1865 -1935 (U.S. G.P.O, 1935)

Manual of the grasses of the West Indies - Hitchcock, A. S. (Albert Spear), 1865 -1935 (U.S. Dept. of Agriculture, 1936)

Manual of the New Zealand flora - Cheeseman, T. F. (Thomas Frederick), 1846 -1923 (Govt. Printer, 1925)

Manual of the southeastern flora :being descriptions of the seed plants growing naturally in Florida, Alabama, Mississippi, eastern Louisiana, Tennessee, North Carolina, South Carolina and Georgia - Small, John Kunkel, 1869 -1938 (The author, 1933)