David A. Powell (EDT)/ Pratima Prasad (EDT)
(2)
D. A. Powell/ David Trinidad
(1)
David A. Davis (EDT)/ Tara Powell (EDT)
(1)
David A. Davis (EDT)/ Tara Powell (EDT)/ Jessica B. Harris (FRW)
(1)
David A. Dosser (EDT)/ Dorothea Handron (EDT)/ Susan McCammon (EDT)/ John Y. Powell (EDT)/ Sandra A. Spencer
(1)
David A. Lake (EDT)/ Robert Powell (EDT)
(1)
David A. Powell (EDT)/ Tamara Powell (EDT)
(1)
David A. Powell/ Eric J. Wittenberg
(1)
Luigi Boitani (EDT)/ Roger A. Powell (EDT)/ L. David Mech (FRW)
(1)
Muhammad A. Dandamaev/ Victoria A. Powell (TRN)/ Marvin A. Powell (EDT)/ David B. Weisberg (EDT)
(1)
Steven D. Bloom/ David A. Powell (FRW)
(1)