Sheppard, James K., San Diego Zoo Institute for Conservation Research, 15600 San Pasqual Valley Road, Escondido, CA 92027‐7000, USA.

• Ornitología Neotropical Vol. 27 - Short Communications
  ANDEAN CONDOR (VULTUR GRYPHUS) NESTING IN NORTHEASTERN COLOMBIA AND DIFFERENCES IN LAYING DATES ALONG THE ANDES
  Abstract  PDF