April, 1931

INFORMATION FOR THE GUIDANCE OF FIELD MEN AND COOPERATORS OF THE BUREAU

OF BIOLOGICAL SURVEY ENGAGED IN THE CONTROL OF INJURIOUS RODENTS AND

PREDATORY ANIMALS

Prepared under the direction of Paul G. Redington, _Chief,

Bureau of Biological Survey_, in the Division of Predatory-Animal and

Rodent-Control, Stanley P. Young, _Principal Biologist, in

Charge_

Information for the Guidance of Field Men and Cooperators of the Bureau of Biological Survey Engaged in the Control of Injurious Rodents and Predatory Animals · 第 3 / 22 题