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3КнигаОпубліковано 1971“...National College of Agricultural Engineering...”
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5КнигаОпубліковано 1971“...National College of Agricultural Engineering (Great Britain)...”
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6КнигаОпубліковано 1973“...National College of Agricultural Engineering...”
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7КнигаОпубліковано 1973“...National College of Agricultural Engineering...”
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9Матеріали конференцій КнигаОпубліковано 1969“...Agricultural Engineering Symposium National College of Agricultural Engineering, Silsoe...”