PIERSMA T (1993) Book reviews: Heinrich, B., One man s owl. 1987 & Ravens in winter, 1990. LIMOSA 66 (1): 35-36.
HEINRICH B. 1987. One man's owl. Princeton University Press, Princeton. 224 p. ISBN 0.691.08470.X HEINRICH B. 1990. Ravens in winter. Barrie & Jenkins, London. 379 p. ISBN 0.7126.3829.6
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