No. Title 



* 37. Survey of the Columbia River and its tributaries — Part IV. By 



Floyd G. Bryant and Zell E. Parkhurst. September 1950, ii + 

 108 pp. , 9 figs. , 2 tables. 



* 38. Survey of the Columbia River and its tributaries — Part V. By 



Reed S. Nielson. August 1950, ii + 41 pp. , 6 figs. , 1 table. 



* 39. Survey of the Columbia River and its tributaries — Part VI. By 



Zell E. Parkhurst. October 1950, ii + 58 pp. , 9 figs. , 1 table. 



* 40. Survey of the Columbia River and its tributaries- -Part VII. By 



Zell E. Parkhurst. November 1950, ii + 95 pp. , 8 figs. , 1 table. 



-■- 41. Oxygen block in the main- stem Willamette River. By Frederic F. 

 Fish and Richard A. Wagner. September 1950, i + 19 pp., 1 fig.. 



3 tables. 



* 42. Tuna fishing in Palau waters. Translated from the Japanese lan- 



guage by SCAP translators and W. G. Van Campen. Edited by 



B. M. Shimada and W. G. Van Campen. January 1951, i + 26 pp. , 



4 tables, 2 charts. 



* 43. Fishing conditions south of the Marshall Islands. Translated from 



the Japanese language by W. G. Van Campen. January 1951, 

 iii + 23 pp. , 4 tables. 



* 44. Tuna bait resources at Saipan. Translated from the Japanese 



language by W. G. Van Campen. January 1951, i + 15 pp., 

 4 tables. 



* 45. Exploratory tuna fishing in Indonesian waters. Translated from 



the Japanese language by SCAP translators and W. G. Van Campen. 

 Edited by B. M. Shimada and W. G. Van Campen. January 1951, 

 i + 17 pp., 4 tables, 2 charts. 



* 46. Exploratory tuna fishing in the Caroline Islands. Translated from 



the Japanese language by W. G. Van Campen. January 1951, i + 

 42 pp. , 19 tables, 1 chart. 



* 47. Exploratory tuna fishing in the Marshall Islands. Translated from 



the Japanese language by SCAP translators and W. G. Van Campen. 

 Edited by B. M. Shimada and W. G. Van Campen. January 1951, 

 i + 21 pp., 7 tables, 1 chart. 



* 48. Japanese tuna surveys in tropical waters. Translated from the 



Japanese language by W. G. Van Campen. January 1951, i + 40 pp. 

 4 figs. , 15 tables. 



* 49. The Japanese skipjack fishery. Translated from the Japanese 



language by W. G. Van Campen. January 1951, iii + 67 pp. , 10 

 figs. , 9 tables. 



10 



