Text ( visual ) : unmediated Lands beyond the forest / by Paul B. Sears ; illustrations by Stanley Wyatt. -- Englewood Cliffs, N.J. : Prentice-Hall , c1969. -- xii, 206 p. : ill. ; 25 cm. -- ([Prentice-Hall series in nature and natural history]). -- (BA22438144) ; https://ci.nii.ac.jp/ncid/BA22438144 Author Heading(s): Sears, Paul Bigelow ; Wyatt, Stanley. -- Classification(s): LCC : QH541.5.P7 ; DC : 581.5. -- Subject Heading(s): LCSH : Grassland ecology ; LCSH : Natural history

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