P. V. van Helden

发表

L. Botha, N. C. Gey van Pittius, P. V. van Helden, 2013, Transboundary and emerging diseases.

I. Moser, J. Fafetine, A. Michel, 2015, Transboundary and emerging diseases.

E. Hoal, A. Jolles, D. Cooper, 2016, Transboundary and emerging diseases.

R. Chaisson, R. Hayes, S. Charalambous, 2008, The international journal of tuberculosis and lung disease : the official journal of the International Union against Tuberculosis and Lung Disease.

A. Diacon, G. Theron, R. Warren, 2019, South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde.

A. Michel, P. Buss, P. V. van Helden, 2017, Transboundary and emerging diseases.

M. Behr, A. Demers, D. Coetzee, 2010, The international journal of tuberculosis and lung disease : the official journal of the International Union against Tuberculosis and Lung Disease.