References
- Blayden , H. E. , Gibson , J. and Riley , H. L. An X-ray study of the structure of coals, cokes and chars . Proc. Conference Ultra-fine Struct. Coals & Cokes, Brit. Coal Util. Res. Assoc. pp. 176 – 228 . London
- Horton , L. , Randall , R. B. and Aubrey , K. V. 1944 . The Constitution of Coal: Summary of the existing knowledge . Fuel in Sci. & Pract , 23 ( 4 ) : 100
- Mahadevan , C. 1940 . Studies in coal by X-ray diffraction method . Proc. Nat. Inst. Sci. India , 6 ( 3 ) : 569 – 579 .
- Mitra , G. B. 1954 . Identification of inorganic impurities in coal by the X-ray diffraction method . Fuel , 33 ( 3 ) : 316 – 329 .
- Mitra , G. B. and Sen , J. 1956 . X-ray diffraction study of inorganic structural units in fossil wood . Amer. Jour. Sci , 254 ( 4 ) : 257 – 259 .
- Nelson , J. B. 1953 . Assessment of the mineral species associated with coal . Monthly Bull. Brit. Coal Util. Res. Assoc , 17 ( 2 ) : 41 – 54 .
- Pant , D. D. 1956 . On two compressed Palaeozoic axes: Stigmaria ficoides in the Gym-nostrobus condition and Vertebraria indica. . Ann. Bot. (N. S.) , 20 ( 79 ) : 419 – 429 .
- Sen , J. 1955a . The organisation of microscopic super-micelles in some carbonaceous materials and Indian coal, and their woody mother substance . Riv. Ital. Pal. e Strat , 61 ( 1 ) : 1 – 16 .
- Sen , J. 1955b . Structure of Vertebraria. . Nature , 175 ( 4447 ) : 176
- Sen , J. 1956 . Fine structure in degraded, ancient and buried wood, and other fossilised plant derivatives . Bot. Rev , 22 ( 6 ) : 343 – 374 .
- Sen , J. Orientation of quartz grains in some Indian silicified woods . The Palaeobotanist , In press a
- Sen , J. The organisation of structural units in fossil wood . Riv. Ital. Pal. e Strat , In press b
- Sen , J. The nature of ancient wood . Bot. Gaz , In press c
- Sen , J. Further studies on the structure of Vertebraria Unpub
- Sen , J. and Basak , R. K. 1955 . The nature of ancient wood. II. The structure and properties of well preserved tracheids and fibres . Bull. Torrey Bot. Club , 82 ( 3 ) : 183 – 195 .
- Walton , John and Wilson , J. A. R. 1932 . On the structure of Vertebraria. . Proc. Roy. Soc. Edin , 52 (2, 8) : 200 – 207 .