[1] Washington Univ, Dept Anthropol, St Louis, MO 63130 USA
[2] Inst Portugues Patrimonio Arquitecton, Divisao Conservacao & Restauro, P-1400206 Lisbon, Portugal
[3] Univ Alberta, Dept Anthropol, Edmonton, AB T6G 2H4, Canada
[4] Quinta Leziria, Sociedade Torrejana Espeleol & Arqueol, P-2350 Torres Novas, Portugal
[5] Univ Oxford, Archaeol & Hist Art Res Lab, Radiocarbon Accelerator Unit, Oxford OX1 3QJ, England
[6] Univ Bordeaux 1, Lab Anthropol, CNRS, Unite Mixte Rech 5809, F-33405 Talence, France
[7] Rijksuniv Gronigen, Fac Wiskunde & Natuurwetenschappen, Centrum Isotopen Onderzoek, NL-9747 AG Groningen, Netherlands
[8] Inst Portugues Arqueol, P-1300 Lisbon, Portugal