Leo J. Th Vanderkamp (Vanderkamp, Leo J. Th)

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  Longitudinal Data Analysis: Designs, Models and Methods
  by Catrien C. J. H. Bijleveld, Leo J. Van der Kamp, Ab Mooijaart, Willem A. Van der Kloot, Rien Van der Leeden
  Softcover, SAGE Publications, Limited, ISBN 0761955380 (0-7619-5538-0)
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  Statistical Models in Psychological and Educational Testing
  by D. N. De Gruijter, Leo J. Van der Kamp
  Hardcover, Swets & Zeitlinger Publishers, ISBN 9026505175 (90-265-0517-5)