Published in Bulletin North of Scotland College of Agriculture (UK). no. 20 (1980)

by Isaacs R.J
Published in Bulletin. North of Scotland College of Agriculture (UK) (1976)

Published in College Bulletin. North of Scotland College of Agriculture (UK). no. 15 (1978)

by Young C.D, Sutherland R.M
Published in College Bulletin. North of Scotland College of Agriculture (UK). no. 14 (1978)

by Mackel C
Published in College Bulletin. North of Scotland College of Agriculture (UK). no. 13 (1977)

by Younie, D. (School of Agriculture, Aberdeen, Scotland (UK)), Black, J.S
Published in Bulletin. North of Scotland College of Agriculture (UK) (1979)

Published in Bulletin, North of Scotland College of Agriculture (UK) (1975)