Authors: J D Woodley; E A Chornesky; P A Clifford; J B Jackson; L S Kaufman; N Knowlton; J C Lang; M P Pearson; J W Porter; M C Rooney; K W Rylaarsdam; V J Tunnicliffe; C M Wahle; J L Wulff; A S Curtis; M D Dallmeyer; B P Jupp; M A Koehl; J Neigel; E M Sides Journal: Science Date: 1981-11-13 Impact factor: 47.728