H.J. Scheltema, 1906-1981H. J. Scheltema, J. H. A. Lokin, Willem R. H. Koops · First published 1982Open the Tome
Flores legum H. J. Scheltema oblatiH. J. Scheltema, Robert Feenstra, J. H. A. Lokin, N. van der Wal · First published 1972Open the Tome
