by Widmer R.E, Ascher P.D
Published in Miscellaneous Report - Minnesota Agricultural Experiment Station (USA). no. 140 (1976)

by Widmer, R.E
Published in Acta horticulturae (01.12.1976)

by Widmer R.E, Ascher P.D, Stuart M.C
Published in Minnesota report - University of Minnesota (1990)

by Anderson, N.O, Liedl, B.E, Ascher, P.D, Widmer, R.E, Desborough, S.L
Published in Sexual plant reproduction (1988)

by Prasad M, Widmer R.E, Marshall R.R
Published in Communications in soil science and plant analysis (01.06.1983)

by Corr, B.E, Widmer, R.E
Published in HortScience (1988)

by Widmer R.E
Published in HortScience (01.04.1988)

by Widmer R.E
Published in Minnesota State florists bulletin (1987)

by Widmer, R.E
Published in Plant patent - United States Patent and Trademark Office (USA) (20.11.1990)

by Widmer R.E
Published in Minnesota State florists bulletin (1984)

by Widmer R.E
Published in Minnesota State florists bulletin (1984)

by Widmer, R.E
Published in Minnesota State florists bulletin (USA) (01.08.1987)

by Widmer, R.E
Published in Minnesota State florists bulletin (USA) (01.04.1987)

by Widmer, R.E
Published in Minnesota State florists bulletin (USA) (01.04.1985)

by Widmer, R.E
Published in Minnesota State florists bulletin (USA) (01.02.1985)

by Widmer, R.E
Published in Minnesota State florists bulletin (USA) (01.12.1984)

by Widmer R.E
Published in American Vegetable Grower and Greenhouse Grower (1978)

by Widmer, R.E
Published in Minnesota horticulturist (1977)

by Widmer R.E
Published in Minnesota Horticulturist (1977)

by Widmer, R.E
Published in Florists' review (03.01.1980)