
    No. 81-2147.
    No. 81-2188.
    Arizona et al. v. San Carlos Apache Tribe of Arizona et al.; Arizona et al. v. Navajo Tribe of Indians et al.; and Montana et al. v. Northern Cheyenne Tribe of the Northern Cheyenne Indian Reservation et al.
   C. A. 9th Cir. [Certiorari granted, 459 U. S. 821.] Motion of petitioners in No. 81-2188 for leave to file a response to the memorandum of the United States filed after argument granted. Motion of respondent Navajo Nation in No. 81-2147 for leave to file a brief after argument granted.  