Ritchie, John W. 1871-1943.
Biology and human affairs / John W. Ritchie. - Yonkers-on-Hudson, N.Y. : World book, c1941. - xiv, 1026 p. : ill. (incl. ports.) ; 23 cm.
At head of title: By John W. Ritchie.
Includes bibliographical references and index.
41010594
Biology.
QH308.5 / .R5
574 / RIB
Biology and human affairs / John W. Ritchie. - Yonkers-on-Hudson, N.Y. : World book, c1941. - xiv, 1026 p. : ill. (incl. ports.) ; 23 cm.
At head of title: By John W. Ritchie.
Includes bibliographical references and index.
41010594
Biology.
QH308.5 / .R5
574 / RIB