@misc{liska_perrin_2009, title={Indirect land use emissions in the life cycle of biofuels: regulations vs science}, volume={3}, number={3}, journal={Biofuels, Bioproducts & Biorefining: BIOFPR}, author={Liska, A. J. and Perrin, R. K.}, year={2009}, pages={318–328} }
 @inbook{perrin_1994, title={Intellectual property rights in agricultural development}, ISBN={0851988806}, booktitle={Agricultural technology : policy issues for the international community}, publisher={Wallingford : CAB International in association with the World Bank}, author={Perrin, R. K.}, year={1994}, pages={499} }
 @article{perrin_1993, title={Intellectual property rights in the public interest}, ISBN={0944919049}, journal={U.S. agricultural research : strategic challenges and options}, publisher={Bethesda, Md. : Agricultural Research Institute}, author={Perrin, R. K.}, year={1993}, pages={181} }
 @article{perrin_1990, title={Economic analysis of biotechnology research}, volume={22}, number={1}, journal={Southern Journal of Agricultural Economics}, author={Perrin, R. K.}, year={1990}, pages={73} }
 @article{perrin_sappie_1990, title={North Carolina: farm income and production 1950-1989}, number={83}, journal={Economics Information Report}, author={Perrin, R. K. and Sappie, G. P.}, year={1990}, pages={56} }
 @article{perrin_scobie_1981, title={MARKET INTERVENTION POLICIES FOR INCREASING THE CONSUMPTION OF NUTRIENTS BY LOW INCOME HOUSEHOLDS}, volume={63}, ISSN={["1467-8276"]}, DOI={10.2307/1239813}, abstractNote={Abstract}, number={1}, journal={AMERICAN JOURNAL OF AGRICULTURAL ECONOMICS}, author={PERRIN, RK and SCOBIE, GM}, year={1981}, pages={73–82} }
 @article{perrin_1976, title={VALUE OF INFORMATION AND VALUE OF THEORETICAL MODELS IN CROP RESPONSE RESEARCH}, volume={58}, ISSN={["1467-8276"]}, DOI={10.2307/1238577}, abstractNote={Abstract}, number={1}, journal={AMERICAN JOURNAL OF AGRICULTURAL ECONOMICS}, author={PERRIN, RK}, year={1976}, pages={54–61} }
 @article{perrin_1972, title={ASSET REPLACEMENT PRINCIPLES}, volume={54}, ISSN={["0002-9092"]}, DOI={10.2307/1237734}, abstractNote={Abstract}, number={1}, journal={AMERICAN JOURNAL OF AGRICULTURAL ECONOMICS}, author={PERRIN, RK}, year={1972}, pages={60-&} }