Text Formatting ⇒ No Dash Between Page Numbers in References

[cgifted]

When I try to include the page numbers in my references, it results in the second page number being missing from the reference. For example:

Code: Select all

@article{CampbellCosworth,
author = {Campbell, John},
month = {06},
pages = {7--18},
title = {Hoyt memorial lecture - Stop pouring, start casting},
journal = {International Journal of Metalcasting},
year = {2012}
}

results in...

J. Campbell, Hoyt memorial lecture - stop pouring, start casting, International Journal
of Metalcasting, 7 (2012).

Notice how the -18 is missing in the page number. Let me know if you see where I'm going wrong. Thanks!