@BOOK {COUPER:1995b,
title = {Farm records and work planning on agricultural research farms: IITA research guide, No. 18},
author = {Couper, D. C. },
series = {IITA research guide, No. 18},
year = {1995},
month = {July},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
note = {18p.},
}