Das, B. C.
36267 39894 45680 49505
Intermediate trigonometry . — 19th.ed. C1-20th.ed. C3-37th.ed. . — Kolkata : U.N.Dhur, 1958 C1-1959 C3-1985.
Lost and replaced by another book named H. S. Trigonometry Subjects--Index Terms: Mathematics
Koha