00313nam a2200109 a 4500008004100000050001800041245005500059246001800114260004000132300002200172350000900194120416s1972    ||||||||||||||||| ||    u  aGB 1197.7 Nef10aDeciphering of groundwater from aerial photographs  aK. E. Nefedov  aNew DelhibAmerind Publishingc1972  axii, 191p. : ill.  a0.00