-extern RecTypeGrs recTypeGrs_sgml;
-extern RecTypeGrs recTypeGrs_regx;
-extern RecTypeGrs recTypeGrs_tcl;
-extern RecTypeGrs recTypeGrs_marc;
-extern RecTypeGrs recTypeGrs_marcxml;
-extern RecTypeGrs recTypeGrs_xml;
-extern RecTypeGrs recTypeGrs_perl;
-extern RecTypeGrs recTypeGrs_danbib;
+int zebra_grs_retrieve(void *clientData, struct recRetrieveCtrl *p,
+ data1_node *(*grs_read)(struct grs_read_info *));