Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1934)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1942)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1956)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1958)

Plant life - American Plant Life Society. (American Plant Life Society, 1946)

Plant life - American Plant Life Society. (American Plant Life Society, 1949)

Plant life - American Plant Life Society. (American Plant Life Society, 1950)

Plant life - American Plant Life Society. (American Plant Life Society, 1951)

Plant life - American Plant Life Society. (American Plant Life Society, 1952)

Plant life - American Plant Life Society. (American Plant Life Society, 1953)

Plant life - American Plant Life Society. (American Plant Life Society, 1954)

Plant life - American Plant Life Society. (American Plant Life Society, 1955)

Plant life - American Plant Life Society. (American Plant Life Society, 1956)

Plant life - American Plant Life Society. (American Plant Life Society, 1957)

Plant life - American Plant Life Society. (American Plant Life Society, 1958)

Plant life - American Plant Life Society. (American Plant Life Society, 1959)

Plant life - American Plant Life Society. (American Plant Life Society, 1971)

Plant life - American Plant Life Society. (American Plant Life Society, 1972)