The LM4136 (and I think other companies produce them as well) is nothing special, simply a quad op-amp with decent noise characteristics (though not exactly in the OP-275 or even NE5532 category). As low noise stuff went in the late 70's it was probably the most convenient package, and certainly prived better - per op-amp - than anything in the same noise-spec class at that time. You can see it compared to other op-amps in the article in one of the first few issues of DEVICE at my site (http://hammer.ampage.org
As was pointed out, the TL075 will sub for it with respect to pinout, though the TL075 has a much higher input impedance. As was also pointed out, the TL075 is especially hard to find.
Anyone designing a layout for a project using a 4136 should probably redesign it to use a more standard quad op-amp pinout such as used by the TL064/74/84, LM324, LM348, and numerous other quad packages that are still easy to find.