Andrews, W. A. (1974). Teachers guide for contours: Studies of the environment. Prentice-Hall, Inc.
Cita Chicago Style (17a ed.)Andrews, William A. Teachers Guide for Contours: Studies of the Environment. Englewood Cliffs, N.J: Prentice-Hall, Inc, 1974.
Cita MLA (9a ed.)Andrews, William A. Teachers Guide for Contours: Studies of the Environment. Prentice-Hall, Inc, 1974.
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