The publishing industry is a vast system whose elements form a metaphorical ecosystem with knowledge flowing through connections between heterogeneous elements.  In this paper we seek a more robust understanding of different types of literature, and whether and how they support one another in the diffusion of knowledge.  We analyze a corpus comprising professional electronic media in US dentistry and its relation to the peer reviewed journal literature. Our corpus includes full text from magazines, news sites and blogs that provide information to clinicians.  We find links to research are made through several mechanisms: articles describing new clinical guidelines, referencing, summaries of recently published journal articles and crossover authoring.  There is little to no apparent time lag in the diffusion of information from research literature to professional media.