TY - JOUR T1 - Employee age and voluntary development activity JO - International Journal of Training and Development PY - 1998/09/01 AU - Warr P AU - Birdi K ED - DO - DOI: 10.1111/1468-2419.00047 PB - Wiley VL - 2 IS - 3 SP - 190 EP - 204 Y2 - 2025/05/24 ER -