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• Upper Cambrian to Lower Ordovician conodont biostratigraphy and biofacies, Rabbitkettle Formation, District of Mackenzie
  Author(s): Ludvigsen, Rolf. ,  Landing, Ed.
• Silurian trilobites from the northern Yukon Territory
  Author(s): Ludvigsen, Rolf. ,  Tripp, Ronald P.
• The Ordovician trilobite Pseudogygites Kobayashi in eastern and Arctic North America
  Author(s): Ludvigsen, Rolf.

• The water-striders of Ontario : (Heteroptera: Gerridae)
  Author(s): Cheng, Lanna. ,  Fernando, C. H.
• The vegetation and phytogeography of coastal southwestern James Bay
  Author(s): Riley, J. L. ,  McKay, Sheila M.
• Variation in the jaw musculature of the avian family Vireonidae
  Author(s): Barlow, Jon C. ,  Orenstein, Ronald I.