H. V. D. Watt
发表
G. Levy,
H. V. D. Watt,
G. J. Levy,
1988
.
A. Claassens,
H. V. D. Watt,
1990
.
H. V. D. Watt,
1987
.
C. Valentin,
H. V. D. Watt,
1991
.
M. Cabrera,
M. Sumner,
H. V. D. Watt,
1994
.
Amelioration of subsoil acidity by application of a coal-derived calcium fulvate to the soil surface
M. V. D. Walt,
J. Dekker,
R. Barnard,
1991,
Nature.
H. V. D. Watt,
G. Bodman,
1960
.
M. Laker,
J. Dekker,
R. Barnard,
1992
.
P. Berliner,
G. Levy,
H. D. Plessis,
1988
.
G. Levy,
H. D. Plessis,
I. Shainberg,
1988
.
H. V. D. Watt,
G. Croft,
1993
.