
    No. 75-552.
    No. 75-561.
    Kleppe, Secretary of the Interior, et al. v. Sierra Club et al.; and American Electric Power System et al. v. Sierra Club et al.
   C. A. D. C. Cir. [Certiorari granted, 423 U. S. 1047.] Joint motion of petitioners for additional time for oral argument granted and 15 additional minutes allotted for that purpose. Respondents also allotted 15 additional minutes for oral argument.  