Link between OE_HEADERS_IFACE_ALL and OE_LINES_IFACE_ALL interface tables?

SELECT ohi.*

  FROM  oe_headers_iface_all ohi,

  oe_lines_iface_all oli

  WHERE  ohi.orig_sys_document_ref = oli.orig_sys_document_ref

  AND ohi.orig_sys_document_ref = 375768