Published in American Malacological Bulletin, in 1999, in volume 15, pages 97-108

Published in American Malacological Bulletin, in 1999, in volume 15, issue 1, pages 1-31

Published in American Malacological Bulletin, in 1999, in volume 15, issue 1, pages 33-46

Published in American Malacological Bulletin, in 1999, in volume 15, issue 1, pages 47-50

Published in American Malacological Bulletin, in 1999, in volume 15, issue 1, pages 51-56

Published in American Malacological Bulletin, in 1999, in volume 15, issue 1, pages 57-63

Published in American Malacological Bulletin, in 1999, in volume 15, issue 1, pages 65-73

Published in American Malacological Bulletin, in 1999, in volume 15, issue 1, pages 75-82

Published in American Malacological Bulletin, in 1999, in volume 15, issue 1, pages 83-96