DEDICATION
We dedicate this volume to the memory of Dr. Paul Ivan Yakovlev (1894-1983) who spent 42 years (1930-1972) of his productive life in assembling and process-
ing more than 1000 normal and pathological human brain specimens that now constitute the precious Yakovlev Collection.
ACKNOWLEDGMENTS
We thank Dr. William DeMyer, pediatric neurologist at Riley Hospital for Children, Indiana University Medical Center, Indianapolis, Indiana, for access to his
personal library on human central nervous system development. We also thank the staff of the National Museum of Health and Medicine at the Armed Forces
Institute of Pathology, Walter Reed Hospital, Washington, D.C.: Dr. Adrianne Noe, Director; Archibald J. Fobbs, Curator of the Yakovlev Collection; Elizabeth C.
Lockett, and William Discher. We are most grateful to Dr. James M. Petras at the Walter Reed Institute of Research who made his dark room facilities available so
that we could develop all the photomicrographs on location rather than in our laboratory in Indiana. Finally, we thank Barbara Norwitz, Erika Dery, Samar Haddad,
Shayna Murry, and Jonathan Pennell at CRC Press for their personal attention to us and for expert help during production of the manuscript.