@ARTICLE {JUO:1979a,
title = {Effect of liming on the availability of three rock phosphate source in two west Africa ultisols},
author = {Juo, A. S. R. and Kang, B. T. },
journal = {Communications in Soil Science and Plant Analysis},
year = {1979},
volume = {10},
pages = {993--1003},
issn = {0010-3624},
}