RT Journal Article SR Electronic T1 Industry Perspective on the Validation of Column-Based Separation Processes for the Purification of Proteins JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 87 OP 97 VO 46 IS 3 YR 1992 UL http://journal.pda.org/content/46/3/87.abstract AB