1073. "Characteristics and hybridization on important intermountain shrubs III. Sunflower family." McArthur, E. Durant, A. Clyde Blauer, A. Perry Plummer and Richard Stevens, 1979
1073. "Characteristics and hybridization on important intermountain shrubs III. Sunflower family." McArthur, E. Durant, A. Clyde Blauer, A. Perry Plummer and Richard Stevens, 1979
"Characteristics and hybridization on important intermountain shrubs III. Sunflower family." McArthur, E. Durant, A. Clyde Blauer, A. Perry Plummer and Richard Stevens, 1979