00286pam a2200121 a 4500020001000000041000500010082001000015100002300025245006900048250001100117260002800128300000800156  aNilc  h  a620.1  aVerma B P eAuthor  aRock Mechanics For Engineers 3rdcVerma B P hTextual Documents   a3rd ED  bKhanna Publishersc2015  a256