41 



[r 9 2o.] 



GREGORY, H. E., 2. Geology of the Navajo Country; a Reconnaissance of Parts 



of Arizona, New Mexico, and Utah. Prof. Papers, U.S. Geol. Surv. no. 93, 



pp. 1-161, tigs., pis. i-xxxiv [geol. map]. 1917. 

 3. Co-operation in Advanced Geologic Instruction. [Abstract.] Pull. Geol. 



Soc. Am. xxx. p. 94. 1920. 

 4. J. F. Kemp, & others. In Memoriam. Henry Shaler Williams. 



1847-1918. ' Sigma XI. Quarterly,' vi. pp. 53-74, portrait. 1918. A.C. 

 GREGORY, J. W. The Ambrym Eruptions of 1913-14. Geol. Mag. 1917, 



pp. 529-540, pi. xxxiii [sketch-map]. 1917. And A.C. 

 2. A Low-level Glaciated Surface in the Eastern Himalaya. Geol. Mag. 



1919, pp. 397-406, tigs, [sketch-maps]. 1919. And A.C. 



3. The Pre-Glacial Yallevs of Arran and Snowdon. Geol. Mag. 1920, 



pp. 148-164, figs, [sketch-maps]. 1920. And A.C. 

 4. The Red Rocks of a Deep Rore at the North End of the Isle of Man. 



Trans. Inst. M. F. lix. pp. 156-169. 1920; & [Abstract] Coll. Guard, cxix. 



p. 1075. 1920. And A.C. 

 5. The African Ritt Valleys. Geogr. Journ. lvi. pp. 13-47, 327-328, figs. 



[maps], 4 pis. 1920. And A.C. 

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1920. And A.C. 



7. & E. Currie. Echinoidea from Western Persia. Geol. Mag. 1920, 



pp. 500-503, pi. xii. 1920. And A.C. 

 . See also Howchix, W., 5; 8f Spatii, L. F., 2. 



GREGORY, W. K. Mounted Skeleton of Mosehops capensis Broom. ' Abstract.] 



Bull. Geol. Soc. Am. xxxi. p. 223. 1920. 

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U.S.A. vi. pp. 16-17. 1920. 

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Senckenberg. naturf. Gesellsch. xlvii. pp. 58-59. 1918. 

 GRENGG, R. Ueber einen Lagergang von Pikrit im Flysch beim Steinhof. UerJi. 



k.-k. geol. BeicJisanst., Wren, 1914, pp. 265-269. fig. 1914. 

 GREPPIN, E. See Gutzwiller, A., 1 & 2. . 



GRGiNWALL, K. A. Om Nomenklaturen for Sveriges paliiozoiska Bildningar. 



Geol. Fbren. Stockli. ForJi. xlii. pp. 175-178. 1920. 

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palaozoiska Bildningar. Geol. Fbren. Stockh. Fork. xlii. pp. 311-312. 1920. 



. See also Mothe, H. 



GROSJEAN, M. See Dlparc, L., 2. 

 GROSSET, A. See Duparc, L., 3. 



GROSZPIETSCH, O. Ein Tonerdephosphat von Arsita bei Jakubeny (Bukowina). 



Verh. Geol. BeicJisanst., Wien, 1919, pp. 149-155. 1919. 

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264. 1920. 



2, <fe T. M. Broderick. The Magnetite Deposits of the Eastern Mesabi 



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no. 678, pp. 1-259. fius.. pis. i-xvi [map & sections]. 1919. 

 GROYER, N. C. & others. Surface Water Supply of the United States, 1913. 



Parts XI. & XII. Water-Supplu Papers, U.S. Geol. Surv. nos. 361. 1916 ; & 



362. 1917. 



2, & . , 1914, Parts I., II., VI., IX., X., XL, XII. (A-C). Water- 

 Supply Papers, U.S. Geol. Sttrv. nos. 381, 382. 1916; 386, 389, 39D, 391. 

 1917 ; 392, 393. 1916 ; 394, 1917. 



3, & . , 1915. Parts I.-XII. Water-Supply Papers, U.S. Geol. 



Surv. nos. 401. 1917 ; 402. 1916 ; 403, 404, 405, 4U6, ' 407, 408. 1917; 409, 

 410, 411, 412, 413, 414. 1918. 



4, & . , 1916. Parts I.-XII. Water-Supplu Papers, U.S. Geol. 



Surv.. nos. 431, 432. 1918; 433, 434, 1917: 435. 1918; 436. 1919; 437. 

 1918 ; 438. 1917 ; 439, 440. 1919 : 441. 1918 ; 442, 443, 444. 1919. 



5, & . , 1917. Parts L, II., IV., V., VII., & VIII. Water-Supply 



Papers, U.S. Geol. Surv. nos. 451, 452. 1920 : 454, 455, 457, 458. 1919. 



6, & . , 1918. Part IV. Water-Supply Papers, U.S. Geol. Surv. 



no. 474. 1920. 



7. & . Surface Water Supply of Hawaii, July 1, 1913 to June 30, 1915 ; 



July 1, 1915 to June 30, 1916; July 1, 1917 to June 30, 1918. Water-Supply 

 Papers, U.S. Geol. Surv. nos. 430, 440. 1917: 485. 1919. 



