(1697) Schopmeyer, C. S., and A. E. Helmers. 



1947. Seeding as a means of reforestation in the northern Rocky Mountain Region. 

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Schorger, A. W. 



1913. An examination of the oleoresins of some western pines. U.S. Forest Serv. 

 Bull. 119, 36 pp. 



1914. Oils of the Coniferae. III. The leaf and twig, and cone oils of western yellow 

 pine and sugar pine. J. Ind. & Eng. Chem. 6: 893-895. 



1916. Chemistry as an aid in the identification of species. Soc. Amer. Forest. Proc. 

 11: 33-39. 



1917. Mannan content of the gymnosperms . J. Forest. 15: 197-202. 



Schrenk, Hermann von. 

 1903. The "bluing" and the "red rot" of the western yellow pine, with special reference 

 to the Black Hills Forest Reserve. U.S. Dep. Agr. Bur. Plant. Ind. Bull. 

 36, 40 pp. 



Schubert, Gilbert H. 



1952. Germination of various coniferous seeds after cold storage. U.S. Forest Serv. 

 Calif. Forest and Range Exp. Sta. Forest Res. Note 83, 7 pp. 



1953. A trial of three chemicals as rodent repellents in direct seeding. U.S. Forest 

 Serv. Calif. Forest and Range Exp. Sta. Forest Res. Note 84, 2 pp. 



1953. Ponderosa pine cone cutting by squirrels. J. Forest. 51: 202. 



1954. Viability of various coniferous seeds after cold storage. J. Forest. 52: 446-447. 



1955. California cone crop--1955. U.S. Forest Serv. Calif. Forest and Range Exp. 

 Sta. Forest Res. Note 97, 2 pp. 



1955. Effect of storage temperature on viability of sugar, Jeffrey, and ponderosa pine 

 seed. U.S. Forest Serv. Calif. Forest and Range Exp. Sta. Forest Res. 

 Note 100, 3 pp. 



1955. Freezing injury to young sugar pine. J. Forest. 53: 732. 



1956. Effect of ripeness on the viability of sugar, Jeffrey, and ponderosa pine seed. 

 Soc. Amer. Forest. Proc. 1955: 67-69. 



1956. California cone crop- -1956. U.S. Forest Serv. Calif. Forest and Range Exp. 

 Sta. Forest Res. Note 110, 4 pp. 



1957. Seed-tree selection- -a problem in juvenile delinquency? New techniques in for- 

 estry. Northern Calif. Sect. Soc. Amer. Forest. Proc. 1956: 2-6. 



1957. CaUfornia cone crop--1957. U.S. Forest Serv. Calif. Forest and Range Exp, 

 Sta. Res. Note 126, 5 pp. 



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