@article{ljs19057,
 author={Bello, A. A.},
 year={2011},
 title={The Use of Standard Proctor for the Determination of Shrinkage Properties of Reddish Brown Tropical Soil},
 journal={Leonardo J. Sci.},
 volume={10},
 number={19},
 pages={57-68},
 url={http://ljs.academicdirect.org/A19/057_068.pdf}
}