text periodical ne Meppel Boom 1994 9999 continuing Quarterly dut Also issued in print. Mode of access: World Wide Web. 0043-5414 (OCoLC)73634540 http://www.extenza-eps.com/openurl?genre=journal&stitle=wper http://www.extenza-eps.com/openurl?genre=journal&stitle=wper OCLCS 090515 20180628122349.0 ocn321045338 eng