RT Journal Article
SR Electronic
T1 Response
JF Science
JO Science
FD American Association for the Advancement of Science
SP 251
OP 252
DO 10.1126/science.253.5017.251
VO 253
IS 5017
A1 O'BRIEN, STEPHEN J.
A1 MAYR, ERNST
YR 1991
UL http://science.sciencemag.org/content/253/5017/251.abstract
AB