Ziegler, G.

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Ziegler, G.; Roletto, J.; Hays, T.; Gunder, B. 2000. Enrichment options: (Rhino and the snowman). Animal Keeper's Forum 27 (6): 264-266, 3 plates.

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Ziegler, G.; Roletto, J.; Sponholz, C. 2000. Enrichment options: Scavenging vultures (on bones of Southern White rhino). Animal Keeper's Forum 27 (10): 452-453, 1 plate.

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Grams, K.; Ziegler, G.; Shaffstall, W.L. 1996. Enrichment options: Rhinos/Hoofstock. Animal Keeper's Forum 23 (10): 556.

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