United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Youngberg, Harold W.(Oregon State University. Dept. of Crop Science, 1982)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Youngberg, Harold W.(Oregon State University. Dept. of Crop Science, 1983)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Youngberg, Harold W.(Oregon State University. Dept. of Crop Science, 1984)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Youngberg, Harold W.(Oregon State University. Dept. of Crop Science, 1985)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Youngberg, Harold W.(Oregon State University. Dept. of Crop Science, 1986)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Youngberg, Harold W.(Oregon State University. Dept. of Crop Science, 1987)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Youngberg, Harold W.(Oregon State University. Dept. of Crop Science, 1988)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Young, William C.(Oregon State University. Dept. of Crop Science, 1989)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Young, William C.(Oregon State University. Dept. of Crop Science, 1990)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Young, William C.(Oregon State University. Dept. of Crop Science, 1991)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Young, William C.(Oregon State University. Dept. of Crop Science, 1992)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Young, William C.(Oregon State University. Dept. of Crop Science, 1993)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Young, William C.(Oregon State University. Dept. of Crop Science, 1994)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Young, William C.(Oregon State University. Dept. of Crop Science, 1995)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Young, William C.(Oregon State University. Dept. of Crop Science, 1996)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Youngberg, Harold W.(Oregon State University. Dept. of Crop Science, 1997)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Youngberg, Harold W.(Oregon State University. Dept. of Crop Science, 1998)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Young, William C.(Oregon State University. Dept. of Crop Science, 1999)
United States. Agricultural Research Service.; Oregon State University. Dept. of Crop Science.; Young, William C.(Oregon State University. Dept. of Crop Science, 2000)