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Roles and Responsibilities Section of the Proposed Revised Guidelines 
Introduction to Roles and Responsibilities (Dr. LeRoy Walters) 191 
Committee Discussion of this Section 193 
Invited Witnesses — Presentations and Questions 
Dr. David Suzuki 201 
Mr. Sheldon Samuels 205 
Dr. Dennis Chamot 207 
Dr. John Adams 211,219 
Dr. Donald Duvick 217 
Mr. Leslie Dach 220 
Ms. Nancy Pfund 224 
Dr. Bernard Davis 229 
Public Witnesses — Presentations and Questions 
Dr. James Watson 234 
Dr. Naum Bers 246 
Mr. Scott Thacher 247 
Dr. Waclaw Szybalski 249 
Dr. Arthur Schwartz 250 
Ms. Pamela Lippe 254 
Statements of the Members of the Director's Advisory Committee 
Dr. Donald Fredrickson 254 
Ms. Rosemary Menard 256 
Mr. Jon Beaty 257 
Dr. James Neel 259 
Dr. Harold Ginsberg 260 
Mr. Dennis Helms 262 
Dr. Mario Molina ..... 264 
Dr. Margery Shaw 267 
Dr. A. Karim Ahmed 268 
Mr. Peter Hutt 270 
Dr. Ann Vidaver . . . 274 
Dr. Robert Sinsheimer 276 
Ms. Patricia King 278 
Sir John Kendrew 281 
Professor Walter Rosenblith 284 
Dr. Roger DeRoos 286 
Dr. Katharine Sturgis 288 
Dr. James Gustafson 289 
Closing Remarks by Dr. Fredrickson 291 
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