Phillip Thurtle (University of Washington), Manufacturing Horticultural Novelties: Variance and Standardization in the Production and Marketing of Luther Burbank's Creations
Presented at Plants, Animals and Ownership: Innovation and Intellectual Property Protection in Living Organisms Since the 18th Century, 3-5 June, 2011, Yale.
Downloads: audio. (Right click and "save as".)
You can also listen to this paper on the IPBio Network's Youtube channel, here.