by Palmer, T.P, Whitelaw, J.S, Janson, C.G
Published in New Zealand journal of agriculture (1974)

by Janson, C.G, Knight, T.L
Published in New Zealand journal of experimental agriculture (01.09.1973)

by Palmer T.P, Dunbier M.W, Janson C.G, Woodhead M
Published in Proceedings of the Annual Conference of the Agronomy Society of New Zealand (1975)

by Janson, C.G. (Winchmore Irrigation Res. Sta., Ashburton (New Zealand))
Published in Span (UK) (1976)

by Baars, J.A, Douglas, J.A, Knight, T, Janson, C.G. (Ruakura Agricultural Centre, MAF, Hamilton (New Zealand))
Published in Proceedings of the New Zealand Grassland Association (New Zealand) (1990)