Martin, H. M. a. J. (1955). INTRODUCTION TO AGRICULTURAL ENGINEERING. McGraw-Hill Book Company, Inc..
Chicago-viite (17. p.)Martin, H.F. McColly and J.W. INTRODUCTION TO AGRICULTURAL ENGINEERING. McGraw-Hill Book Company, Inc., 1955.
MLA-viite (8. p.)Martin, H.F. McColly and J.W. INTRODUCTION TO AGRICULTURAL ENGINEERING. McGraw-Hill Book Company, Inc., 1955.
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