scholarly article in Castanea, vol. 42 no. 1, 1977

scientific article published in 1981

scholarly article in Sida, vol. 14 no. 2, 1990

scholarly article in Sida, vol. 7 no. 4, 1978

scholarly article in Sida, vol. 14 no. 1, 1990

scholarly article in Sida, vol. 8 no. 1, 1979

scientific article published in 1984

scientific article published in 1981

scholarly article in Sida, vol. 8 no. 2, 1979

scientific article published in 1981

scholarly article in Sida, vol. 14 no. 4, 1991

scientific article published in 1968

article published in 1978

scholarly article in Sida, vol. 7 no. 2, 1977

scientific article published in 1972

scientific article published in 1982

article by John L Vankat et al published 1975 in Castanea

scholarly article in Castanea, vol. 42 no. 2, 1977

scientific article (publication date: August 1977)