Persistency of Lactation in Dairy Cows

A Preliminary Study of Certain Guernsey and Holstein Records

by Charles Bovett Sayre, Ernest Everett De Turk, Foster Floyd Elliott, Frederick Alexander Davidson, Frederick Charles Bauer, Frederick Francis Weinard, George Harlan Dungan, James Lloyd Edmonds, Lacey Fletcher Rickey, Tom Sherman Hamilton, Walter Lee Gaines, William Barbour Nevens, Harold Clayton M. Case, Chalmers Woodruff Crawford, Henry Perly Rusk, Herman Bernard Dorner, Louie Henrie Smith, Philip Augustus Lehenbauer, Robert Cooke Ross, William Leonidas Burlison, Robert Watt Stark