by Happ, George M., Happ, Christine M., Barras, Stanley J.
Published in Tissue & cell (1971)

by Happ, G.M, Happ, C.M, Barras, S.J
Published in Canadian journal of botany (15.05.1976)

by Happ, G.M, Happ, C.M, Barras, S.J
Published in Canadian journal of botany (01.12.1975)

by Barras, Stanley J
Year of Publication 1974

by Barras, S.J
Published in Canadian entomologist (01.10.1973)

by Hemingway, Richard W., McGraw, Gerald W., Barras, Stanley J.
Published in Journal of agricultural and food chemistry (01.07.1977)

by Barras, S.J, Hodges, J.D
Published in Canadian entomologist (01.05.1969)