Very cool indeed: WZZN, Chicago's oldies station, has a page on their website with all the weekly music surveys from their '60s/'70s Top 40 heyday -- you can search for any week you want. Hours of fun!
http://www.947thezone.com/timemachine.aspthe Top 30 songs this week in 1970:
1. I Think I Love You...Partridge Family
2. Fire & Rain...James Taylor
3. I'll Be There...Jackson Five
4. We've Only Just Began...Carpenters
5. It Dont Matter To Me...Bread
6. Somebody's Been Sleeping...100 Proof
7. Deeper & Deeper..Freda Payne
8. Gypsy Woman...Brian Hyland
9. Green Eyed Lady...Sugarloaf
10. Lola...Kinks
11. Tears Of A Clown...Smokey Robinson & The Miracles
12. All Right Now...Free
13. Lucretia MacEvil...Blood, Sweat & Tears
14. Look What They've Done To My Song, Ma...The New Seekers
15. Lets Work Together...Canned Heat
16. Candida...Dawn
17. El Condor Pasa...Simon & Garfunkel
18. Its Only Make Believe...Glen Campbell
19. Heaven Help Us All...Stevie Wonder
20. Montego Bay...Bobby Bloom
21. Cracklin' Rosie...Neil Diamond
22. God, Love And Rock & Roll...Teegarden & Van Winkle
23. Indiana Wants Me...R. Dean Taylor
24. That's Where I Went Wrong...Poppy Family
25. Out In The Country...Three Dog Night
26. Share The Land...Guess Who
27. Cry Me A River...Joe Cocker
28. Stand By Your Man...Candi Staton
29. See Me, Feel Me...The Who
30. Still Water (Love)...Four Tops