by Standifer L. N, Cornelissen G, Halberg F
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1674 (1983)

by Allen Joyce E, Gadson Kenneth E
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1685 (1983)

by Wilson Louis F, Millers Imants
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1675 (1983)

by Todd E. L
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1645 (1982)

by Passey H. B
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1669 (1982)

by Smith R.E
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1655 (1982)

by Stoller E. W
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1642 (1981)

Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1652 (1981)

by Devine T.E, Breithaupt B.H
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1628 (1981)

by Foote Richard H
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1607 (1981)

by White Richard E
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1629 (1981)

by Spriggs John
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1662 (1981)

Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1663 (1981)

by Muesebeck Carl Frederick William
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1617 (1980)

by Gunn Charles R
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1601 (1979)

by Fye R.E
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. no. 1592 (1979)

by Vogt G.B, McGuire J.U, Cushman A.D
Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. no. 1593 (1979)

Published in United States. Dept. of Agriculture. Technical bulletin (USA). no. 1658 (1980)

by Gunn, Charles R
Published in United States. Dept. of Agriculture. Technical bulletin (USA) (1983)

by Anon
Published in United States. Dept. of Agriculture. Technical bulletin (USA) (1982)