Perhaps you should try some spelling variations:
"nijhoff book title 2006" » "nijhoff boston title 2006", "nijhoff ebook title 2006", "nijhoff book table 2006", "nijhoff work title 2006", "nijhoff book title 26", "nijhoff book title 20", "nijhoff book title 2012"
"nijhoff book titles 2006" » "nijhoff boston titles 2006", "nijhoff book entitled 2006", "nijhoff book intitled 2006", "nijhoff ebook titles 2006", "nijhoff book tables 2006", "nijhoff work titles 2006"
"nijhoff op tables 2006" » "nijhoff op tables 206", "nijhoff op tables 26", "nijhoff op tables 2.6", "nijhoff _ tables 2006", "nijhoff j tables 2006", "nijhoff top tables 2006", "nijhoff up tables 2006", "nijhoff p tables 2006"

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