Published in American Malacological Bulletin, in 1990, in volume 8, issue 1, pages 9-18

Published in American Malacological Bulletin, in 1990, in volume 8, issue 1, pages 19-24

Published in American Malacological Bulletin, in 1990, in volume 8, issue 1, pages 37-44

Published in American Malacological Bulletin, in 1990, in volume 8, issue 1, pages 53-59

Published in American Malacological Bulletin, in 1990, in volume 8, issue 1, pages 61-66

Published in American Malacological Bulletin, in 1990, in volume 8, issue 1, pages 67-75

Published in American Malacological Bulletin, in 1990, in volume 8, issue 1, pages 77-84