00497nam a2200157Ia 4500 190328s9999||||xx |||||||||||||| ||und|| 63-22070 NITIL NITIL 21st 311.201 J67T Johnson, Leonard G Theory and technique of variation research Leonard G Johnson Amsterdam Elesevier 1964 viii, 105p+3tab Variations; Calculus of Variations; Variations,Regional economic; Research BKS 10005 10005 0 0 DDC 0 0 NITIL NITIL 2019-04-02 0 311.201 J67T 49681 2019-04-02 00:00:00 2019-04-02 BKS