A preliminary study of retention of hair, feathers or egg shells in the digestive tracts of certain predatory birds and mammals :
submitted in partial fulfillment for the degree of Master of Forestry ... /
by Willet Wandell.
APA Citation
Wandell, W. N., University of Michigan. School of Forestry and Conservation. (1939). A preliminary study of retention of hair, feathers or egg shells in the digestive tracts of certain predatory birds and mammals: submitted in partial fulfillment for the degree of Master of Forestry .... .
MLA Citation
Wandell, Willet N, and University of Michigan. School of Forestry and Conservation. A Preliminary Study of Retention of Hair, Feathers Or Egg Shells In the Digestive Tracts of Certain Predatory Birds And Mammals: Submitted In Partial Fulfillment for the Degree of Master of Forestry .... , 1939.
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