We would like to express our appreciation for the support of the Federal Highway Administration in the completion of this report. In particular Paul Garrett, the technical representative for this project, for his suggestions and information and Frank Waltos, agreement officer, for providing initial feedback on the structure of the proposal.
We are also grateful to the Library services department, particularly Bernida Reid in the interlibrary loan department for their assistance in obtaining materials. Dr. Larry Brown, chair of the Department of Biology at Virginia State University originally drew our attention to the request for this proposal.