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Kauffman, Erle, (7154) 



speeding up the poplar i interesting experiments in selective breeding 



and hybridization. Amer. Forests and Forest Life 33: 269-271, illus. 

 1927. 



Keffer, C. A. (7155) 



seed selection. Forester 4: 77-78. 1898. 



Kline, W. A. (7156) 



a rare hybrid oak in Pennsylvania. Forest Leaves 16: 120-121, illus. 

 1918. 



Kraebel, C. J. (7157) 



CHOOSING THE BEST TREE SEEDS | THE INFLUENCE OF PARENTAL CHARACTER AND 



environment upon the progeny of douglas fir. Jour. Heredity 8 (11) : 

 483-492. 1917. 



Lamb, W. H. (7158) 



hybrid trees; ... a review. Jour. Heredity 7 (7) : 311-319, illus. 1916. 



(7159) 



VALUE OF THE BIG TREE CONTEST; PHOTOGRAPHS RECEIVED BY AMERICAN GENETIC 

 ASSOCIATION THROW LIGHT ON MANY INTERESTING PROBLEMS. JOUT. Heredity 



6 (9) : 424-428, illus. 1915. 



Leopold, Aldo. (7160) 



some thoughts on forest genetics. Jour. Forestry 27 : 708-713. 1929. 



MacDougal, D. T. (7161) 



hybridization of the oak. Sci. Amer. Sup. 63 (1628) : 26105-26106, illus. 

 1907. 



McKee, R. H. (7162) 



reducing the time factor in tree growth. Canad. Woodlands Rev. 2 (2) : 

 9-10, 30, 34. 1930. 



Meelian, T. H. (7163) 



CONTRIBUTIONS TO THE LIFE HISTORY OF PLANTS ; THE BARTRAM OAK IN CONNEC- 

 TION with variation and hybridism. Acad. Nat. Sci. Phila. Proc. 54 : 

 33-34. 1902. 



Mount, H. A. (7164) 



CROSSBREEDING TREES TO STRENGTHEN SPECIES. Pop. Mechanics Mag. 36 (1) : 



70-71, illus. 1921. 



Munns, E. N. (7165) 



HOW SEED SELECTION FORCED ITS WAY INTO EUROPEAN FORESTRY. U. S. Dept. 



Agr., Forest Worker 6 (1) : 19. 1930. 



Natural Science Association. (7166) 



hybrid oaks of staten island, n. y. 4 pp., illus. New Brighton. 1888. 



Ness, H. (7167) 



hybrids of the live oak and overcup oak. Jour. Heredity 9 (6) : 263-268, 

 illus. 1918. 



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possibilities of hybrid oaks. Jour. Heredity 18 (9) : 381-386, illus. 1927. 



Penhallow, D. P. (7169) 



THE RECOGNITION OF HYBRID CHARACTERS IN THE STRUCTURE OF THE VASCULAR 



cylinder as expressed in the genus catalpa. Science 21 : 505-506. 1905. 



Roeser, Jacob, Jr. (7170) 



the importance of seed source and the possibilities of forest tree breed- 

 ing. Jour. Forestry 24 : 38-51. 1926. 



ROSENDAHL, C. O. (7171) 



OBSERVATIONS ON BETULA IN MINNESOTA WITH SPECIAL REFERENCE TO SOME 



natural hybrids. Minn. Bot. Studies 4 (4) : 443-459, illus. 1916. 



Sauer, L. W. (7172) 



QUERCus leana, a hybrid oak. Plant World 12: 198-201, illus. 1909. 



Schenck, J. (7173) 



CROSS FERTILIZATION OF THE CHESTNUT TREE. Bot. GaZ. 6 : 159-161. 1881. 



