@inbook{rohrbach_spurlin_mayberry_rajala_2004, title={Engineering computing as an essential component of inquiry-guided learning}, booktitle={Teaching and learning through inquiry: A guidebook for institutions and instructors}, publisher={Sterling, VA: Stylus Publishing}, author={Rohrbach, R. and Spurlin, J. and Mayberry, K and Rajala, S.}, year={2004} }
 @book{lee_greene_wellman_al._2004, title={Teaching and learning through inquiry: A guidebook for institutions and instructors}, publisher={Sterling, Va.: Stylus Pub.}, author={Lee, V. S. and Greene, D. B. and Wellman, D. J. and al.}, year={2004} }
 @article{rohrbach_mainland_1993, title={Accurate low cost measurement of blueberry firmness for research workers}, ISBN={["90-6605-475-1"]}, ISSN={["0567-7572"]}, DOI={10.17660/actahortic.1993.346.47}, number={346}, journal={FIFTH INTERNATIONAL SYMPOSIUM ON VACCINIUM CULTURE}, author={Rohrbach, RP and Mainland, CM}, year={1993}, pages={338–353} }
 @article{rohrbach_tinsey_1989, title={Ultrasonic position control for small fruit pruners}, DOI={10.4271/952129}, number={89-1595}, journal={Paper (American Society of Agricultural Engineers)}, author={Rohrbach, R. P. and Tinsey, K. G.}, year={1989}, pages={21} }
 @article{rohrbach_franke_willits_1982, title={A firmness sorting criterion for blueberries}, volume={25}, DOI={10.13031/2013.33516}, abstractNote={ABSTRACT A nonlinear differential equation was used to model the contact force of the rebounding blueberry. Model parameters were determined by a least squares curve fitting algorithm resulting in correlations of 0.98 for model mass with berry mass and 0.62 for model firm-ness with berry firmness. The peak force parameter (pro-portional to max force/square of time to max force) can be determined quickly and correlates well with model firmness (R = 0.87).}, number={2}, journal={Transactions of the ASAE}, author={Rohrbach, R. P. and Franke, J. E. and Willits, D. H.}, year={1982}, pages={261} }