9109.  Ponce, V. M. 2004. The curious legacy of Pampa Grande  South American Explorer, 77, xx-yy. (HTML) (To appear soon).

9108.  Ponce, V. M. 2003. Travels on the Rio Paraguay  South American Explorer, 73, 27-34. (HTML)

9107.  Ponce, V. M. 2003. Viva el Peru, Karajia!  South American Explorer, 70, 26-28. (HTML)

9106.  Ponce, V. M. 1999. Alexander von Humboldt on Geophagy.   South American Explorer, 55, 22-25.

9105.  Ponce, V. M. 1994. The Gran Bajo de San Julián.  South American Explorer, 38, 38-40.

9104.  Ponce, V. M. 1992. Letter to SAE.   South American Explorer, 31, 37.

9103.  Ponce, V. M. 1990. The One True Way.   South American Explorer, 26, 30-34.

9102.  Ponce, V. M. 1989. With Humboldt on the Casiquiare.   South American Explorer, 23, 4-12.