@BOOK {DVORAK:1996a,
title = {Labor requirement in assessment of technologies: IITA research guide, No. 27},
author = {Dvorak, K. A. },
series = {IITA research guide, No. 27},
year = {1996},
month = {October},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
note = {14p.},
}