ALDO LEOPOLD/ CHARLES W. SCHWARTZ (ILT)
(1)
Aldo Leopold (EDT)/ Baird J. Callicott (EDT)/ Eric T. Freyfogle (EDT)
(1)
Aldo Leopold/ Charles W. Schwartz (ILT)
(1)
Aldo Leopold/ Curt Meine (EDT)
(1)
Aldo Leopold/ Luna B. Leopold/ Charles W. Schwartz (ILT)
(1)
Aldo Leopold/ Michael Sewell (PHT)
(1)
Aldo Leopold/ Susan L. Flader/ J. Baird Callicott (EDT)
(1)
David E. Brown/ Neil B. Carmony/ Aldo Leopold
(1)
David Mazel (EDT)/ Aldo Leopold (CON)/ Lewis Mumford (CON)/ Henry Tuckerman (CON)/ James Russell Lowell (CON)
(1)