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41. |
 |
|
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by Murray Feshbach, Alfred Friendly, Lester Brown
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42. |
 |
|
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by Mould R F, Richard F. Mould
|
|
43. |
 |
|
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by Todd Steven Foglesong, Peter H. Solomon
|
|
44. |
 |
|
 |
by David Stuart Lane
|
|
45. |
 |
|
 |
by Juliet Johnson
|
|
46. |
 |
|
 |
by Dr. Alexander Elder, Alexander Elder
|
|
47. |
 |
|
 |
by William Craft Brumfield
|
|
48. |
 |
|
 |
by Timothy J. Colton
|
|
49. |
 |
|
 |
by Manfred Sack, Rolf R. Borchard
|
|
50. |
 |
|
 |
by James W. Brock, Walter Adams
|
|
51. |
 |
|
 |
by Zoltan Barany
|
|
52. |
 |
|
 |
by Guive Mirfendereski
|
|
53. |
 |
|
 |
by Eugene Huskey
|
|
54. |
 |
|
 |
by Dean Lebaron
|
|
55. |
 |
|
 |
by Peter Oppenheimer, Brigitte Granville
|
|
56. |
 |
|
 |
by Marie Clayton, Zoia Belyakova, Leonid Bogdanov, etc.
|
|
57. |
 |
|
 |
by Marshall Pomer, Lawrence R. Klein
|
|
58. |
 |
|
 |
by Sidney Monas, Grigory Kaganov
|
|
59. |
 |
|
 |
by James Cracraft
|
|
60. |
 |
|
 |
by Alvin Rabushka, Michael S. Bernstam, Michael S. Bernstam
|
|