The Evolution of India's Northern Borders. By P. C. Chakravati. New York: Asia Publishing House (for India Council of World Affairs), 1971. xii, 179 pp. Illustrations, Maps, Bibliography, Index. $6.95. - Kashmir Awakes. By B. L. Sharma. Delhi: Vikas Publications, 1971. x, 292 pp. Appendices, Index. Rs. 28.50. - Struggle for the Himalayas: A Study in Sino- Indian Relations. By Shanti Prasad Varma. 2d ed. New Delhi: Sterling Publishers, 1971. xvi, 316 pp. Bibliography, Index. Rs. 42.50.