@BOOK {CLAASSEN:1995,
title = {Management of tillage equipment on research farms: IITA research guide, No. 10},
author = {Claassen, S. L. },
series = {IITA research guide, No. 10},
year = {1995},
month = {September},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
note = {33p.},
}