(1825) Spurr, Stephen H. 



1953. Forest genetics at the University of Michigan. Lake States Forest Genet. Conf. 

 Proc, U.S. Forest Serv. Lake States Forest Exp. Sta. Misc. Rep. 22, 

 pp. 23-27. 



(1826) Squillace, A. E. 



1952. Opportunities for forest genetics research in the northern Rocky Mountain 

 region. Mont. Acad. Sci. Proc. 11: 3-7. 



(1827) 



1953. Effect of squirrels on the supply of ponderosa pine seed. U.S. Forest Serv. 



Northern Rocky Mountain Forest and Range Exp. Sta. Res. Note 131, 4 pp. 



(1828) and Lowell Adams. 



1950. Dispersal and survival of seed in a partially-cut ponderosa pine stand. U.S. 



Forest Serv. Northern Rocky Mountain Forest and Range Exp. Sta. Res. 

 Note 79, 4 pp. 



(1829) andR. T. Bingham. 



1954. Forest genetics research in the Northern Rocky Mountain Region. J. Forest. 



52: 691-692, 



(1830) and Roy R. Silen. 



1962. Racial variation in ponderosa pine. Forest Sci. Monogr. 2, 27 pp. 



(1831) Srivastava, L. M. 



1963. Secondary phloem in the Pinaceae. Univ. Calif. Pub. Bot. 36: 1-142. 



(1832) Staebler, George R. 



1958. Some mensurational aspects of the level-of-growing stock problem in even-aged 

 stands. J. Forest. 56: 112-115. 



(1833) Stage, Albert R. 



1958. Growth of thinned ponderosa pine in western Montana. J. Forest. 56: 757-760. 



(1834) 



1962. Tables for point-sample cruising in ponderosa pine. U.S. Forest Serv. Inter- 

 mountain Forest and Range Exp. Sta. Res. Pap. 63, 15 pp. 



(1835) Staley, John M. 



1964. A survey of coniferous foliage diseases (other than rusts) in Colorado. U.S. 



Agr. Res. Serv. Plant Dis. Reptr. 48: 562-563. 



(1836) 



1964. A new Lophodermium on ponderosa pine. Mycologia 56: 757-762. 



(1837) Stanfield, J. F. 



1932. Osmotic pressure of leaves of Pinus scopulorum and certain environmental 

 factors. Bot. Gaz. 93: 453-465. 



(1838) Stanley, Robert G. 



1957. Glucose metabolism in germinating pine pollen (Pinus ponderosa). Plant Physiol. 



Proc. 32, Suppl. XLVI. 



(1839) 



1958. Methods and concepts applied to a study of flowering in pine. Pp. 583-599. 



IN: The Physiology of Forest Trees (Kenneth V. Thimann, Ed.). N. Y. : 

 Ronald Press Co. 



(1840) 



1962. Viable pine pollen stored 15 years produces unsound seed. Silvae Genet. 11: 164. 



114 



