Authors:
Schimmelpfennig, D
Thirtle, C
van Zyl, J
Arnade, C
Khatri, Y
Citation: D. Schimmelpfennig et al., Short and long-run returns to agricultural R&D in South Africa, or will the real rate of return please stand up?, AGR ECON, 23(1), 2000, pp. 1-15
Authors:
Shapiro, S
Rosenberg, L
Hoffman, M
Truter, H
Cooper, D
Rao, S
Dent, D
Gudgeon, A
van Zyl, J
Katzenellenbogen, J
Bailie, R
Citation: S. Shapiro et al., Risk of breast cancer in relation to the use of injectable progestogen contraceptives and combined estrogen/progestogen contraceptives, AM J EPIDEM, 151(4), 2000, pp. 396-403