TY - JOUR T1 - Claim-Evidence Structures in Environmental Science Writing: Modifying Toulmin's Model to Account for Multimodal Arguments JF - Technical Communication Quarterly Y1 - 2012 A1 - Whithaus, Carl VL - 21 SP - 105-128 UR - http://www.tandfonline.com/doi/abs/10.1080/10572252.2012.641431 ER -