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Bulletin P

Volume 8

Number 134
February 1964
The 1963 Iowa corn yield test

Number 135
February 1965
The 1964 Iowa corn yield test

Number 136
February 1966
The 1965 Iowa corn yield test

Number 137
February 1967
The 1966 Iowa corn yield test

Number 138
February 1968
The 1967 Iowa corn yield test

Number 139
October 1969
Behavior studies related to pesticides: Agricultural chemicals and Iowa agricultural-chemical dealers

Number 140
October 1969
Behavior studies related to pesticides: Urban chemical pesticides and Iowa urban chemical-pesticide dealers

Number 141
April 1978
Profile of Iowa farms and farm families: 1976