Hawker,M. F. J. Horticultural machinery/ M.F.J. Hawker and J.F. Keenlyside. - 3rd ed. - London : Longman, 1985. - x, 180 p. : ill. ; 22 cm. Includes index. ISBN: 0582408075 (pbk.) Subjects--Topical Terms: Horticultural machinery. LC Class. No.: S678.7 / H38 1985