by VAN DEUN, A, ROORDA, F. A, CHAMBUGONJ, N, HYE, M. A, HOSSAIN, M. A
Published in The international journal of tuberculosis and lung disease (01.09.1999)

by Pieterse, A.H., Roorda, F.A.
Published in Aquatic botany (1982)

by Pieterse, A.H, Roorda, F.A, Verhagen, L
Published in Experientia (15.06.1980)

by Roorda, F.A, Schulten, G.G.M, Andriessen, E.A.M
Published in Zeitschrift für Angewandte Entomologie (01.01.1982)

by Russell V.M, Schulten G.G.M, Roorda F.A
Published in Zeitschrift für Angewandte Entomologie (1980)