The couple plan to be married July 4, at the Crouseville Advent Christian Church by the Rev. Paul C. Blackstone of Seekonk, Mass. and New York City, formerly of Perham.
Miss Crouse attended the the University of Maine and William and Mary College in Virginia. Both Miss Crouse and Mr. Duncan received their bachelor's degrees from Bryant College, Providence, R.I. Mr. Duncan also graduated from Husson College in Bangor. Miss Crouse is employed as secretary to the associate medical director of Wyeth Laboratories in Radnor, Penn.
Mr. Duncan is a sales manager, eastern division, for Hartcrest Sportswear Company with home offices in Worthington, Ohio.