Mr. and Mrs. Hubertis Martin of Agnos have announced the engagement and upcoming marriage of their daughter, Crystal Ann Martin, to John Ray Dern, son of Mr. and Mrs. Ray Dern of Koshkonong, Mo.The bride-elect is a 1995 graduate of Highland High School and received a bachelor's degree from Williams Baptist College in 2001. She is employed with Mammoth Spring School District. She is the granddaughter of the late Orville and Dorthy Martin and Stanley and Ova Tate of Wiseman. The prospective groom is a 1989 graduate of Koshkonong High School. He is an owner- operator of Dern Trucking. He is the grandson of the late Max and June Dern and Alex and Dorthy O'Neil of Myrtle. The ceremony will be at 2 p.m. May 26 at the bride's parents' home in Agnos.All friends and family are invited to attend.