TY - BOOK AU - Nand, Drahma . AU - Tyagi , B.S.. AU - Sharma, Bhu Dev . TI - Attraction and Potential U1 - 500 PY - 0000///Nd CY - Meerut PB - Kedar Nath Ram Nath KW - Mathematics KW - Attraction-Potential KW - Potential-Attraction KW - G-Mathematics ER -