00504nam a22001577a 450000300070000000500170000700800410002402000230006504000090008808200210009710000480011824500940016625000120026026000540027230000200032633001020250904141615.0250904b        sa ||||| |||| 00| 0 eng d  a9780869809198qpbk  c3228 0a594.1760968 APPL  a Appleton, C. C.   Pietermaritzburg, 1996    aFreshwater Molluscs Of Southern Africa :bWith A Chapter On Bilharzia And Its Snail Hosts  a1st Ed.  aPietermaritzburgbUniversity Of Natal Pressc1996  a64 pagesc24 cm