Well, According to this article by Amanda Carpenter in the Washington Times, Holdren and his co-authors have now distanced themselves from the words published in Ecoscience 32 years ago. From the article:
http://www.washingtontimes.com/news/2009/jul/15/hot-button-40981162/
When asked whether Mr. Holdren’s thoughts on population control have changed over the years, his staff gave The Washington Times a statement that said, “This material is from a three-decade-old, three-author college textbook. Dr. Holdren addressed this issue during his confirmation when he said he does not believe that determining optimal population is a proper role of government. Dr. Holdren is not and never has been an advocate for policies of forced sterilization.”
...
The White House also passed along a statement from the Ehrlichs that said, in part, “anybody who actually wants to know what we and/or Professor Holdren believe and recommend about these matters would presumably read some of the dozens of publications that we and he separately have produced in more recent times, rather than going back a third of a century to find some formulations in an encyclopedic textbook where description can be misrepresented as endorsement.”
Cuckoo, cuckoo.....