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Nisa Leksungnoen, Paul G. Johnson, and Roger K. Kjelgren
Pág. 105 - 111
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Hongyan Sun, Kelly Kopp, and Roger Kjelgren
Pág. 254 - 263
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Chalita Sriladda, Heidi A. Kratsch, Steven R. Larson, and Roger K. Kjelgren
Pág. 715 - 720
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Roger Kjelgren, Lixue Wang, and Daryl Joyce
Pág. 1358 - 1365
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Nickolee Zollinger, Richard Koenig, Teresa Cerny-Koenig, and Roger Kjelgren
Pág. 529 - 534
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Nickolee Zollinger, Roger Kjelgren, Teresa Cerny-Koenig, Kelly Kopp and Rich Koenig
Pág. 267 - 274
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J. Ryan Stewart, Roger Kjelgren, Paul G. Johnson, and Michael R. Kuhns
Pág. 1529 - 1533
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Montague, Thayne; Kjelgren, Roger; Rupp, Larry
Pág. 299 - 309
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Montague, Thayne; Kjelgren, Roger; Rupp, Larry
Pág. 763 - 768
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Kjelgren, Roger; Rupp, Larry; Kilgren, Doug
Pág. 1037 - 1040
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