Hallenberg, Heather.
The lake of the avernus and its elusive mystery. - Missouri-US : University of Missouri-Columbia, 1978. - páginas 49-59 : ilustraciones blanco y negro - Anual - No.12 (1978) - MUSE. Annual of the Museum of art and archaeology ; no.12 . - University of Missouri-Columbia. .
The lake of the avernus and its elusive mystery. - Missouri-US : University of Missouri-Columbia, 1978. - páginas 49-59 : ilustraciones blanco y negro - Anual - No.12 (1978) - MUSE. Annual of the Museum of art and archaeology ; no.12 . - University of Missouri-Columbia. .