add environment and planning. I'm adding this as one journal although there are technically four - A-D ( http://www.ncbi.nlm.nih.gov/nlmcatalog?term=%22environment%20and%20planning%22[All%20Fields]&cmd=DetailsSearch# items 6-8 and 16) following the same style. It seems silly to clutter the repository with this, but not sure. @rmzelle - thoughts? If we're leaving it at one style, should we add the ISBNs of the other journals?