0000950152-02-002000 DEF 14A 1 20020416 20020320 CITIZENS & NORTHERN CORP 0000810958 6022 232451943 PA 1231 DEF 14A 34 000-16084 02579704 THOMPSON ST RALSTON PA 17763 7172656171 90-92 MAIN ST WELLSBORO PA 16901 DEF 14A 1 l91763adef14a.txt CITIZENS AND NORTHERN CORP.--DEFINITIVE PROXY