by Jansen, E.H.J.M. (Rijksinstituut voor Volksgezondheid en Milieuhygiene, Bilthoven (Netherlands)), Stephany, R.W, Vos, J.G, Ruitenberg, E.J, Benraad, T.J, Boer, F. de, Ruig, W.G. de, Weijman, J, Schmidt, N.A
Published in The Veterinary quarterly (1989)

by Trienekens, P.H., Schmidt, N.A., Thijssen, J.H.H.
Published in Contraception (Stoneham) (01.05.1986)

by Pieterse, E.W.M.G., Scholtis, R.J.H., Schmidt, N.A.
Published in Clinica chimica acta (1969)

by Gijzen, A.H.J., de Kock, H.W., Meulendijk, P.N., Schmidt, N.A., Schopman, W., Tertoolen, J.F.W., Voogd, C.E.
Published in Clinica chimica acta (24.01.1983)

by Van De Calseyde, J.F., Scholtis, R.J.H., Schmidt, N.A., Kuypers, A.M.J.
Published in Clinica chimica acta (01.01.1969)

by Van de Calseyde, J.F., Scholtis, R.J.H., Schmidt, N.A., Leyten, C.J.J.A.
Published in Clinica chimica acta (01.05.1971)

by Van de Calseyde, J.F., Scholtis, R.J.H., Schmidt, N.A., Leijten, C.J.J.A.
Published in Clinica chimica acta (01.04.1972)

by Schmidt, N.A., Scholtis, R.J.H.
Published in Clinica chimica acta (01.01.1964)

by Pieterse, E.W.M.G., Scholtis, R.J.H., Schmidt, N.A.
Published in Clinica chimica acta (01.10.1969)

by van de Calseyde, J.F., Scholtis, R.J.H., Schmidt, N.A., Kuypers, A.M.J.
Published in Clinica chimica acta (1970)