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

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1966)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1967)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1968)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1969)

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)